Make naming of IEndpointRouteBuilderConsistent across usages.

src/Http/Routing/ref/Microsoft.AspNetCore.Routing.netcoreapp3.0.cs

@@ -5,20 +5,20 @@ namespace Microsoft.AspNetCore.Builder
 {
     public static partial class EndpointRouteBuilderExtensions
     {
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder Map(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, Microsoft.AspNetCore.Routing.Patterns.RoutePattern pattern, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder Map(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, Microsoft.AspNetCore.Routing.Patterns.RoutePattern pattern, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder Map(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, Microsoft.AspNetCore.Routing.Patterns.RoutePattern pattern, string displayName, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder Map(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, Microsoft.AspNetCore.Routing.Patterns.RoutePattern pattern, string displayName, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder Map(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder Map(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder Map(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, string displayName, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder Map(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, string displayName, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapDelete(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapDelete(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapDelete(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, string displayName, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapDelete(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, string displayName, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapGet(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapGet(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapGet(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, string displayName, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapGet(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, string displayName, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapPost(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapPost(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapPost(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, string displayName, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapPost(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, string displayName, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapPut(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapPut(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapPut(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, string displayName, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapPut(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, string displayName, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, params object[] metadata) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapVerbs(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, System.Collections.Generic.IList<string> httpMethods, params object[] metadata) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapVerbs(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, System.Collections.Generic.IList<string> httpMethods, params object[] metadata) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapVerbs(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, string displayName, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, System.Collections.Generic.IList<string> httpMethods, params object[] metadata) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapVerbs(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, string displayName, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate, System.Collections.Generic.IList<string> httpMethods, params object[] metadata) { throw null; }
     }
     public static partial class EndpointRoutingApplicationBuilderExtensions
     {
@@ -27,8 +27,8 @@ namespace Microsoft.AspNetCore.Builder
     }
     public static partial class FallbackEndpointRouteBuilderExtensions
     {
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapFallback(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapFallback(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapFallback(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapFallback(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, Microsoft.AspNetCore.Http.RequestDelegate requestDelegate) { throw null; }
     }
     public static partial class MapRouteRouteBuilderExtensions
     {

src/Http/Routing/src/Builder/EndpointRouteBuilderExtensions.cs

@@ -26,179 +26,179 @@ namespace Microsoft.AspNetCore.Builder
         /// Adds a <see cref="RouteEndpoint"/> to the <see cref="IEndpointRouteBuilder"/> that matches HTTP GET requests
         /// for the specified pattern.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="requestDelegate">The delegate executed when the endpoint is matched.</param>
         /// <param name="metadata">Metadata that is added to the endpoint.</param>
         /// <returns>A <see cref="IEndpointConventionBuilder"/> that can be used to further customize the endpoint.</returns>
         public static IEndpointConventionBuilder MapGet(
-            this IEndpointRouteBuilder builder,
+            this IEndpointRouteBuilder routes,
             string pattern,
             RequestDelegate requestDelegate,
             params object[] metadata)
         {
-            return MapVerbs(builder, pattern, displayName: null, requestDelegate, GetVerb, metadata);
+            return MapVerbs(routes, pattern, displayName: null, requestDelegate, GetVerb, metadata);
         }
 
         /// <summary>
         /// Adds a <see cref="RouteEndpoint"/> to the <see cref="IEndpointRouteBuilder"/> that matches HTTP GET requests
         /// for the specified pattern.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="displayName">The display name for the endpoint.</param>
         /// <param name="requestDelegate">The delegate executed when the endpoint is matched.</param>
         /// <param name="metadata">Metadata that is added to the endpoint.</param>
         /// <returns>A <see cref="IEndpointConventionBuilder"/> that can be used to further customize the endpoint.</returns>
         public static IEndpointConventionBuilder MapGet(
-            this IEndpointRouteBuilder builder,
+            this IEndpointRouteBuilder routes,
             string pattern,
             string displayName,
             RequestDelegate requestDelegate,
             params object[] metadata)
         {
-            return MapVerbs(builder, pattern, displayName, requestDelegate, GetVerb, metadata);
+            return MapVerbs(routes, pattern, displayName, requestDelegate, GetVerb, metadata);
         }
 
         /// <summary>
         /// Adds a <see cref="RouteEndpoint"/> to the <see cref="IEndpointRouteBuilder"/> that matches HTTP POST requests
         /// for the specified pattern.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="requestDelegate">The delegate executed when the endpoint is matched.</param>
         /// <param name="metadata">Metadata that is added to the endpoint.</param>
         /// <returns>A <see cref="IEndpointConventionBuilder"/> that can be used to further customize the endpoint.</returns>
         public static IEndpointConventionBuilder MapPost(
-            this IEndpointRouteBuilder builder,
+            this IEndpointRouteBuilder routes,
             string pattern,
             RequestDelegate requestDelegate,
             params object[] metadata)
         {
-            return MapVerbs(builder, pattern, displayName: null, requestDelegate, PostVerb, metadata);
+            return MapVerbs(routes, pattern, displayName: null, requestDelegate, PostVerb, metadata);
         }
 
         /// <summary>
         /// Adds a <see cref="RouteEndpoint"/> to the <see cref="IEndpointRouteBuilder"/> that matches HTTP POST requests
         /// for the specified pattern.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="displayName">The display name for the endpoint.</param>
         /// <param name="requestDelegate">The delegate executed when the endpoint is matched.</param>
         /// <param name="metadata">Metadata that is added to the endpoint.</param>
         /// <returns>A <see cref="IEndpointConventionBuilder"/> that can be used to further customize the endpoint.</returns>
         public static IEndpointConventionBuilder MapPost(
-            this IEndpointRouteBuilder builder,
+            this IEndpointRouteBuilder routes,
             string pattern,
             string displayName,
             RequestDelegate requestDelegate,
             params object[] metadata)
         {
-            return MapVerbs(builder, pattern, displayName, requestDelegate, PostVerb, metadata);
+            return MapVerbs(routes, pattern, displayName, requestDelegate, PostVerb, metadata);
         }
 
         /// <summary>
         /// Adds a <see cref="RouteEndpoint"/> to the <see cref="IEndpointRouteBuilder"/> that matches HTTP PUT requests
         /// for the specified pattern.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="requestDelegate">The delegate executed when the endpoint is matched.</param>
         /// <param name="metadata">Metadata that is added to the endpoint.</param>
         /// <returns>A <see cref="IEndpointConventionBuilder"/> that can be used to further customize the endpoint.</returns>
         public static IEndpointConventionBuilder MapPut(
-            this IEndpointRouteBuilder builder,
+            this IEndpointRouteBuilder routes,
             string pattern,
             RequestDelegate requestDelegate,
             params object[] metadata)
         {
-            return MapVerbs(builder, pattern, displayName: null, requestDelegate, PutVerb, metadata);
+            return MapVerbs(routes, pattern, displayName: null, requestDelegate, PutVerb, metadata);
         }
 
         /// <summary>
         /// Adds a <see cref="RouteEndpoint"/> to the <see cref="IEndpointRouteBuilder"/> that matches HTTP PUT requests
         /// for the specified pattern.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="displayName">The display name for the endpoint.</param>
         /// <param name="requestDelegate">The delegate executed when the endpoint is matched.</param>
         /// <param name="metadata">Metadata that is added to the endpoint.</param>
         /// <returns>A <see cref="IEndpointConventionBuilder"/> that can be used to further customize the endpoint.</returns>
         public static IEndpointConventionBuilder MapPut(
-            this IEndpointRouteBuilder builder,
+            this IEndpointRouteBuilder routes,
             string pattern,
             string displayName,
             RequestDelegate requestDelegate,
             params object[] metadata)
         {
-            return MapVerbs(builder, pattern, displayName, requestDelegate, PutVerb, metadata);
+            return MapVerbs(routes, pattern, displayName, requestDelegate, PutVerb, metadata);
         }
 
         /// <summary>
         /// Adds a <see cref="RouteEndpoint"/> to the <see cref="IEndpointRouteBuilder"/> that matches HTTP DELETE requests
         /// for the specified pattern.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="requestDelegate">The delegate executed when the endpoint is matched.</param>
         /// <param name="metadata">Metadata that is added to the endpoint.</param>
         /// <returns>A <see cref="IEndpointConventionBuilder"/> that can be used to further customize the endpoint.</returns>
         public static IEndpointConventionBuilder MapDelete(
-            this IEndpointRouteBuilder builder,
+            this IEndpointRouteBuilder routes,
             string pattern,
             RequestDelegate requestDelegate,
             params object[] metadata)
         {
-            return MapVerbs(builder, pattern, displayName: null, requestDelegate, DeleteVerb, metadata);
+            return MapVerbs(routes, pattern, displayName: null, requestDelegate, DeleteVerb, metadata);
         }
 
         /// <summary>
         /// Adds a <see cref="RouteEndpoint"/> to the <see cref="IEndpointRouteBuilder"/> that matches HTTP DELETE requests
         /// for the specified pattern.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="displayName">The display name for the endpoint.</param>
         /// <param name="requestDelegate">The delegate executed when the endpoint is matched.</param>
         /// <param name="metadata">Metadata that is added to the endpoint.</param>
         /// <returns>A <see cref="IEndpointConventionBuilder"/> that can be used to further customize the endpoint.</returns>
         public static IEndpointConventionBuilder MapDelete(
-            this IEndpointRouteBuilder builder,
+            this IEndpointRouteBuilder routes,
             string pattern,
             string displayName,
             RequestDelegate requestDelegate,
             params object[] metadata)
         {
-            return MapVerbs(builder, pattern, displayName, requestDelegate, DeleteVerb, metadata);
+            return MapVerbs(routes, pattern, displayName, requestDelegate, DeleteVerb, metadata);
         }
 
         /// <summary>
         /// Adds a <see cref="RouteEndpoint"/> to the <see cref="IEndpointRouteBuilder"/> that matches HTTP requests
         /// for the specified HTTP methods and pattern.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="requestDelegate">The delegate executed when the endpoint is matched.</param>
         /// <param name="httpMethods">HTTP methods that the endpoint will match.</param>
         /// <param name="metadata">Metadata that is added to the endpoint.</param>
         /// <returns>A <see cref="IEndpointConventionBuilder"/> that can be used to further customize the endpoint.</returns>
         public static IEndpointConventionBuilder MapVerbs(
-           this IEndpointRouteBuilder builder,
+           this IEndpointRouteBuilder routes,
            string pattern,
            RequestDelegate requestDelegate,
            IList<string> httpMethods,
            params object[] metadata)
         {
-            return MapVerbs(builder, pattern, displayName: null, requestDelegate, httpMethods, metadata);
+            return MapVerbs(routes, pattern, displayName: null, requestDelegate, httpMethods, metadata);
         }
 
         /// <summary>
         /// Adds a <see cref="RouteEndpoint"/> to the <see cref="IEndpointRouteBuilder"/> that matches HTTP requests
         /// for the specified HTTP methods and pattern.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="displayName">The display name for the endpoint.</param>
         /// <param name="requestDelegate">The delegate executed when the endpoint is matched.</param>
@@ -206,7 +206,7 @@ namespace Microsoft.AspNetCore.Builder
         /// <param name="metadata">Metadata that is added to the endpoint.</param>
         /// <returns>A <see cref="IEndpointConventionBuilder"/> that can be used to further customize the endpoint.</returns>
         public static IEndpointConventionBuilder MapVerbs(
-           this IEndpointRouteBuilder builder,
+           this IEndpointRouteBuilder routes,
            string pattern,
            string displayName,
            RequestDelegate requestDelegate,
@@ -225,85 +225,85 @@ namespace Microsoft.AspNetCore.Builder
                 resolvedMetadata.AddRange(metadata);
             }
 
-            return Map(builder, pattern, displayName ?? $"{pattern} HTTP: {string.Join(", ", httpMethods)}", requestDelegate, metadata: resolvedMetadata.ToArray());
+            return Map(routes, pattern, displayName ?? $"{pattern} HTTP: {string.Join(", ", httpMethods)}", requestDelegate, metadata: resolvedMetadata.ToArray());
         }
 
         /// <summary>
         /// Adds a <see cref="RouteEndpoint"/> to the <see cref="IEndpointRouteBuilder"/> that matches HTTP requests
         /// for the specified pattern.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="requestDelegate">The delegate executed when the endpoint is matched.</param>
         /// <param name="metadata">Metadata that is added to the endpoint.</param>
         /// <returns>A <see cref="IEndpointConventionBuilder"/> that can be used to further customize the endpoint.</returns>
         public static IEndpointConventionBuilder Map(
-            this IEndpointRouteBuilder builder,
+            this IEndpointRouteBuilder routes,
             string pattern,
             RequestDelegate requestDelegate,
             params object[] metadata)
         {
-            return Map(builder, RoutePatternFactory.Parse(pattern), pattern, requestDelegate, metadata);
+            return Map(routes, RoutePatternFactory.Parse(pattern), pattern, requestDelegate, metadata);
         }
 
         /// <summary>
         /// Adds a <see cref="RouteEndpoint"/> to the <see cref="IEndpointRouteBuilder"/> that matches HTTP requests
         /// for the specified pattern.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="displayName">The display name for the endpoint.</param>
         /// <param name="requestDelegate">The delegate executed when the endpoint is matched.</param>
         /// <param name="metadata">Metadata that is added to the endpoint.</param>
         /// <returns>A <see cref="IEndpointConventionBuilder"/> that can be used to further customize the endpoint.</returns>
         public static IEndpointConventionBuilder Map(
-            this IEndpointRouteBuilder builder,
+            this IEndpointRouteBuilder routes,
             string pattern,
             string displayName,
             RequestDelegate requestDelegate,
             params object[] metadata)
         {
-            return Map(builder, RoutePatternFactory.Parse(pattern), displayName, requestDelegate, metadata);
+            return Map(routes, RoutePatternFactory.Parse(pattern), displayName, requestDelegate, metadata);
         }
 
         /// <summary>
         /// Adds a <see cref="RouteEndpoint"/> to the <see cref="IEndpointRouteBuilder"/> that matches HTTP requests
         /// for the specified pattern.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="requestDelegate">The delegate executed when the endpoint is matched.</param>
         /// <param name="metadata">Metadata that is added to the endpoint.</param>
         /// <returns>A <see cref="IEndpointConventionBuilder"/> that can be used to further customize the endpoint.</returns>
         public static IEndpointConventionBuilder Map(
-            this IEndpointRouteBuilder builder,
+            this IEndpointRouteBuilder routes,
             RoutePattern pattern,
             RequestDelegate requestDelegate,
             params object[] metadata)
         {
-            return Map(builder, pattern, pattern.RawText ?? pattern.DebuggerToString(), requestDelegate, metadata);
+            return Map(routes, pattern, pattern.RawText ?? pattern.DebuggerToString(), requestDelegate, metadata);
         }
 
         /// <summary>
         /// Adds a <see cref="RouteEndpoint"/> to the <see cref="IEndpointRouteBuilder"/> that matches HTTP requests
         /// for the specified pattern.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="displayName">The display name for the endpoint.</param>
         /// <param name="requestDelegate">The delegate executed when the endpoint is matched.</param>
         /// <param name="metadata">Metadata that is added to the endpoint.</param>
         /// <returns>A <see cref="IEndpointConventionBuilder"/> that can be used to further customize the endpoint.</returns>
         public static IEndpointConventionBuilder Map(
-            this IEndpointRouteBuilder builder,
+            this IEndpointRouteBuilder routes,
             RoutePattern pattern,
             string displayName,
             RequestDelegate requestDelegate,
             params object[] metadata)
         {
-            if (builder == null)
+            if (routes == null)
             {
-                throw new ArgumentNullException(nameof(builder));
+                throw new ArgumentNullException(nameof(routes));
             }
 
             if (pattern == null)
@@ -346,12 +346,12 @@ namespace Microsoft.AspNetCore.Builder
                 }
             }
 
-            var modelEndpointDataSource = builder.DataSources.OfType<ModelEndpointDataSource>().FirstOrDefault();
+            var modelEndpointDataSource = routes.DataSources.OfType<ModelEndpointDataSource>().FirstOrDefault();
 
             if (modelEndpointDataSource == null)
             {
                 modelEndpointDataSource = new ModelEndpointDataSource();
-                builder.DataSources.Add(modelEndpointDataSource);
+                routes.DataSources.Add(modelEndpointDataSource);
             }
 
             return modelEndpointDataSource.AddEndpointBuilder(routeEndpointBuilder);

src/Http/Routing/src/Builder/FallbackEndpointRouteBuilderExtensions.cs

@@ -16,7 +16,7 @@ namespace Microsoft.AspNetCore.Builder
         /// Adds a specialized <see cref="RouteEndpoint"/> to the <see cref="IEndpointRouteBuilder"/> that will match
         /// requests for non-file-names with the lowest possible priority.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="requestDelegate">The delegate executed when the endpoint is matched.</param>
         /// <returns>A <see cref="IEndpointConventionBuilder"/> that can be used to further customize the endpoint.</returns>
         /// <remarks>
@@ -31,11 +31,11 @@ namespace Microsoft.AspNetCore.Builder
         /// <c>{*path:nonfile}</c>. The order of the registered endpoint will be <c>int.MaxValue</c>.
         /// </para>
         /// </remarks>
-        public static IEndpointConventionBuilder MapFallback(this IEndpointRouteBuilder builder, RequestDelegate requestDelegate)
+        public static IEndpointConventionBuilder MapFallback(this IEndpointRouteBuilder routes, RequestDelegate requestDelegate)
         {
-            if (builder == null)
+            if (routes == null)
             {
-                throw new ArgumentNullException(nameof(builder));
+                throw new ArgumentNullException(nameof(routes));
             }
 
             if (requestDelegate == null)
@@ -43,14 +43,14 @@ namespace Microsoft.AspNetCore.Builder
                 throw new ArgumentNullException(nameof(requestDelegate));
             }
 
-            return builder.MapFallback("{*path:nonfile}", requestDelegate);
+            return routes.MapFallback("{*path:nonfile}", requestDelegate);
         }
 
         /// <summary>
         /// Adds a specialized <see cref="RouteEndpoint"/> to the <see cref="IEndpointRouteBuilder"/> that will match
         /// the provided pattern with the lowest possible priority.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="requestDelegate">The delegate executed when the endpoint is matched.</param>
         /// <returns>A <see cref="IEndpointConventionBuilder"/> that can be used to further customize the endpoint.</returns>
@@ -68,13 +68,13 @@ namespace Microsoft.AspNetCore.Builder
         /// </para>
         /// </remarks>
         public static IEndpointConventionBuilder MapFallback(
-            this IEndpointRouteBuilder builder,
+            this IEndpointRouteBuilder routes,
             string pattern,
             RequestDelegate requestDelegate)
         {
-            if (builder == null)
+            if (routes == null)
             {
-                throw new ArgumentNullException(nameof(builder));
+                throw new ArgumentNullException(nameof(routes));
             }
 
             if (pattern == null)
@@ -87,7 +87,7 @@ namespace Microsoft.AspNetCore.Builder
                 throw new ArgumentNullException(nameof(requestDelegate));
             }
 
-            var conventionBuilder = builder.Map(pattern, "Fallback " + pattern, requestDelegate);
+            var conventionBuilder = routes.Map(pattern, "Fallback " + pattern, requestDelegate);
             conventionBuilder.Add(b => ((RouteEndpointBuilder)b).Order = int.MaxValue);
             return conventionBuilder;
         }

src/Http/Routing/test/testassets/RoutingSandbox/Framework/FrameworkEndpointRouteBuilderExtensions.cs

@@ -15,23 +15,23 @@ namespace RoutingSandbox.Framework
 {
     public static class FrameworkEndpointRouteBuilderExtensions
     {
-        public static IEndpointConventionBuilder MapFramework(this IEndpointRouteBuilder builder, Action<FrameworkConfigurationBuilder> configure)
+        public static IEndpointConventionBuilder MapFramework(this IEndpointRouteBuilder routes, Action<FrameworkConfigurationBuilder> configure)
         {
-            if (builder == null)
+            if (routes == null)
             {
-                throw new ArgumentNullException(nameof(builder));
+                throw new ArgumentNullException(nameof(routes));
             }
             if (configure == null)
             {
                 throw new ArgumentNullException(nameof(configure));
             }
 
-            var dataSource = builder.ServiceProvider.GetRequiredService<FrameworkEndpointDataSource>();
+            var dataSource = routes.ServiceProvider.GetRequiredService<FrameworkEndpointDataSource>();
 
             var configurationBuilder = new FrameworkConfigurationBuilder(dataSource);
             configure(configurationBuilder);
 
-            builder.DataSources.Add(dataSource);
+            routes.DataSources.Add(dataSource);
 
             return dataSource;
         }

src/Http/Routing/test/testassets/RoutingSandbox/HelloExtension/EndpointRouteBuilderExtensions.cs

@@ -13,18 +13,18 @@ namespace Microsoft.AspNetCore.Builder
 {
     public static class EndpointRouteBuilderExtensions
     {
-        public static IEndpointConventionBuilder MapHello(this IEndpointRouteBuilder builder, string template, string greeter)
+        public static IEndpointConventionBuilder MapHello(this IEndpointRouteBuilder routes, string template, string greeter)
         {
-            if (builder == null)
+            if (routes == null)
             {
-                throw new ArgumentNullException(nameof(builder));
+                throw new ArgumentNullException(nameof(routes));
             }
 
-            var pipeline = builder.CreateApplicationBuilder()
+            var pipeline = routes.CreateApplicationBuilder()
                .UseHello(greeter)
                .Build();
 
-            return builder.Map(
+            return routes.Map(
                 template,
                 "Hello " + greeter,
                 pipeline);

src/Http/Routing/test/testassets/RoutingWebSite/HelloExtension/EndpointRouteBuilderExtensions.cs

@@ -13,18 +13,18 @@ namespace Microsoft.AspNetCore.Builder
 {
     public static class EndpointRouteBuilderExtensions
     {
-        public static IEndpointConventionBuilder MapHello(this IEndpointRouteBuilder builder, string template, string greeter)
+        public static IEndpointConventionBuilder MapHello(this IEndpointRouteBuilder routes, string template, string greeter)
         {
-            if (builder == null)
+            if (routes == null)
             {
-                throw new ArgumentNullException(nameof(builder));
+                throw new ArgumentNullException(nameof(routes));
             }
 
-            var pipeline = builder.CreateApplicationBuilder()
+            var pipeline = routes.CreateApplicationBuilder()
                .UseHello(greeter)
                .Build();
 
-            return builder.Map(
+            return routes.Map(
                 template,
                 "Hello " + greeter,
                 pipeline);

src/Middleware/HealthChecks/ref/Microsoft.AspNetCore.Diagnostics.HealthChecks.netcoreapp3.0.cs

@@ -14,9 +14,9 @@ namespace Microsoft.AspNetCore.Builder
     }
     public static partial class HealthCheckEndpointRouteBuilderExtensions
     {
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapHealthChecks(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapHealthChecks(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapHealthChecks(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, Microsoft.AspNetCore.Diagnostics.HealthChecks.HealthCheckOptions options) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapHealthChecks(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, Microsoft.AspNetCore.Diagnostics.HealthChecks.HealthCheckOptions options) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapHealthChecks(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, Microsoft.AspNetCore.Diagnostics.HealthChecks.HealthCheckOptions options, string displayName) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapHealthChecks(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, Microsoft.AspNetCore.Diagnostics.HealthChecks.HealthCheckOptions options, string displayName) { throw null; }
     }
 }
 namespace Microsoft.AspNetCore.Diagnostics.HealthChecks

src/Middleware/HealthChecks/src/Builder/HealthCheckEndpointRouteBuilderExtensions.cs

@@ -21,36 +21,36 @@ namespace Microsoft.AspNetCore.Builder
         /// <summary>
         /// Adds a health checks endpoint to the <see cref="IEndpointRouteBuilder"/> with the specified template.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the health checks endpoint to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the health checks endpoint to.</param>
         /// <param name="pattern">The URL pattern of the health checks endpoint.</param>
-        /// <returns>A convention builder for the health checks endpoint.</returns>
+        /// <returns>A convention routes for the health checks endpoint.</returns>
         public static IEndpointConventionBuilder MapHealthChecks(
-           this IEndpointRouteBuilder builder,
+           this IEndpointRouteBuilder routes,
            string pattern)
         {
-            if (builder == null)
+            if (routes == null)
             {
-                throw new ArgumentNullException(nameof(builder));
+                throw new ArgumentNullException(nameof(routes));
             }
 
-            return MapHealthChecksCore(builder, pattern, null, DefaultDisplayName);
+            return MapHealthChecksCore(routes, pattern, null, DefaultDisplayName);
         }
 
         /// <summary>
         /// Adds a health checks endpoint to the <see cref="IEndpointRouteBuilder"/> with the specified template and options.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the health checks endpoint to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the health checks endpoint to.</param>
         /// <param name="pattern">The URL pattern of the health checks endpoint.</param>
         /// <param name="options">A <see cref="HealthCheckOptions"/> used to configure the health checks.</param>
-        /// <returns>A convention builder for the health checks endpoint.</returns>
+        /// <returns>A convention routes for the health checks endpoint.</returns>
         public static IEndpointConventionBuilder MapHealthChecks(
-           this IEndpointRouteBuilder builder,
+           this IEndpointRouteBuilder routes,
            string pattern,
            HealthCheckOptions options)
         {
-            if (builder == null)
+            if (routes == null)
             {
-                throw new ArgumentNullException(nameof(builder));
+                throw new ArgumentNullException(nameof(routes));
             }
 
             if (options == null)
@@ -58,26 +58,26 @@ namespace Microsoft.AspNetCore.Builder
                 throw new ArgumentNullException(nameof(options));
             }
 
-            return MapHealthChecksCore(builder, pattern, options, DefaultDisplayName);
+            return MapHealthChecksCore(routes, pattern, options, DefaultDisplayName);
         }
 
         /// <summary>
         /// Adds a health checks endpoint to the <see cref="IEndpointRouteBuilder"/> with the specified template, options and display name.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the health checks endpoint to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the health checks endpoint to.</param>
         /// <param name="pattern">The URL pattern of the health checks endpoint.</param>
         /// <param name="options">A <see cref="HealthCheckOptions"/> used to configure the health checks.</param>
         /// <param name="displayName">The display name for the endpoint.</param>
-        /// <returns>A convention builder for the health checks endpoint.</returns>
+        /// <returns>A convention routes for the health checks endpoint.</returns>
         public static IEndpointConventionBuilder MapHealthChecks(
-           this IEndpointRouteBuilder builder,
+           this IEndpointRouteBuilder routes,
            string pattern,
            HealthCheckOptions options,
            string displayName)
         {
-            if (builder == null)
+            if (routes == null)
             {
-                throw new ArgumentNullException(nameof(builder));
+                throw new ArgumentNullException(nameof(routes));
             }
 
             if (options == null)
@@ -90,12 +90,12 @@ namespace Microsoft.AspNetCore.Builder
                 throw new ArgumentException("A valid non-empty display name must be provided.", nameof(displayName));
             }
 
-            return MapHealthChecksCore(builder, pattern, options, displayName);
+            return MapHealthChecksCore(routes, pattern, options, displayName);
         }
 
-        private static IEndpointConventionBuilder MapHealthChecksCore(IEndpointRouteBuilder builder, string pattern, HealthCheckOptions options, string displayName)
+        private static IEndpointConventionBuilder MapHealthChecksCore(IEndpointRouteBuilder routes, string pattern, HealthCheckOptions options, string displayName)
         {
-            if (builder.ServiceProvider.GetService(typeof(HealthCheckService)) == null)
+            if (routes.ServiceProvider.GetService(typeof(HealthCheckService)) == null)
             {
                 throw new InvalidOperationException(Resources.FormatUnableToFindServices(
                     nameof(IServiceCollection),
@@ -105,11 +105,11 @@ namespace Microsoft.AspNetCore.Builder
 
             var args = options != null ? new[] { Options.Create(options) } : Array.Empty<object>();
 
-            var pipeline = builder.CreateApplicationBuilder()
+            var pipeline = routes.CreateApplicationBuilder()
                .UseMiddleware<HealthCheckMiddleware>(args)
                .Build();
 
-            return builder.Map(pattern, displayName, pipeline);
+            return routes.Map(pattern, displayName, pipeline);
         }
     }
 }

src/Middleware/StaticFiles/ref/Microsoft.AspNetCore.StaticFiles.netcoreapp3.0.cs

@@ -61,10 +61,10 @@ namespace Microsoft.AspNetCore.Builder
     }
     public static partial class StaticFilesEndpointRouteBuilderExtensions
     {
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapFallbackToFile(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string filePath) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapFallbackToFile(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string filePath) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapFallbackToFile(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string filePath, Microsoft.AspNetCore.Builder.StaticFileOptions options) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapFallbackToFile(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string filePath, Microsoft.AspNetCore.Builder.StaticFileOptions options) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapFallbackToFile(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, string filePath) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapFallbackToFile(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, string filePath) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapFallbackToFile(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, string filePath, Microsoft.AspNetCore.Builder.StaticFileOptions options) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapFallbackToFile(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, string filePath, Microsoft.AspNetCore.Builder.StaticFileOptions options) { throw null; }
     }
 }
 namespace Microsoft.AspNetCore.StaticFiles

src/Middleware/StaticFiles/src/StaticFilesEndpointRouteBuilderExtensions.cs

@@ -19,7 +19,7 @@ namespace Microsoft.AspNetCore.Builder
         /// requests for non-filenames with the lowest possible priority. The request will be routed to a
         /// <see cref="StaticFileMiddleware"/> that attempts to serve the file specified by <paramref name="filePath"/>.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/>.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/>.</param>
         /// <param name="filePath">The file path of the file to serve.</param>
         /// <returns>The <see cref="IEndpointRouteBuilder"/></returns>
         /// <remarks>
@@ -38,12 +38,12 @@ namespace Microsoft.AspNetCore.Builder
         /// </para>
         /// </remarks>
         public static IEndpointConventionBuilder MapFallbackToFile(
-            this IEndpointRouteBuilder builder,
+            this IEndpointRouteBuilder routes,
             string filePath)
         {
-            if (builder == null)
+            if (routes == null)
             {
-                throw new ArgumentNullException(nameof(builder));
+                throw new ArgumentNullException(nameof(routes));
             }
 
             if (filePath == null)
@@ -51,7 +51,7 @@ namespace Microsoft.AspNetCore.Builder
                 throw new ArgumentNullException(nameof(filePath));
             }
 
-            return builder.MapFallback(CreateRequestDelegate(builder, filePath));
+            return routes.MapFallback(CreateRequestDelegate(routes, filePath));
         }
 
         /// <summary>
@@ -59,7 +59,7 @@ namespace Microsoft.AspNetCore.Builder
         /// requests for non-filenames with the lowest possible priority. The request will be routed to a
         /// <see cref="StaticFileMiddleware"/> that attempts to serve the file specified by <paramref name="filePath"/>.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/>.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/>.</param>
         /// <param name="filePath">The file path of the file to serve.</param>
         /// <param name="options"><see cref="StaticFileOptions"/> for the <see cref="StaticFileMiddleware"/>.</param>
         /// <returns>The <see cref="IEndpointRouteBuilder"/></returns>
@@ -76,13 +76,13 @@ namespace Microsoft.AspNetCore.Builder
         /// </para>
         /// </remarks>
         public static IEndpointConventionBuilder MapFallbackToFile(
-            this IEndpointRouteBuilder builder,
+            this IEndpointRouteBuilder routes,
             string filePath,
             StaticFileOptions options)
         {
-            if (builder == null)
+            if (routes == null)
             {
-                throw new ArgumentNullException(nameof(builder));
+                throw new ArgumentNullException(nameof(routes));
             }
 
             if (filePath == null)
@@ -90,7 +90,7 @@ namespace Microsoft.AspNetCore.Builder
                 throw new ArgumentNullException(nameof(filePath));
             }
 
-            return builder.MapFallback(CreateRequestDelegate(builder, filePath, options));
+            return routes.MapFallback(CreateRequestDelegate(routes, filePath, options));
         }
 
         /// <summary>
@@ -98,7 +98,7 @@ namespace Microsoft.AspNetCore.Builder
         /// requests for non-filenames with the lowest possible priority. The request will be routed to a
         /// <see cref="StaticFileMiddleware"/> that attempts to serve the file specified by <paramref name="filePath"/>.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/>.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/>.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="filePath">The file path of the file to serve.</param>
         /// <returns>The <see cref="IEndpointRouteBuilder"/></returns>
@@ -121,13 +121,13 @@ namespace Microsoft.AspNetCore.Builder
         /// </para>
         /// </remarks>
         public static IEndpointConventionBuilder MapFallbackToFile(
-            this IEndpointRouteBuilder builder,
+            this IEndpointRouteBuilder routes,
             string pattern,
             string filePath)
         {
-            if (builder == null)
+            if (routes == null)
             {
-                throw new ArgumentNullException(nameof(builder));
+                throw new ArgumentNullException(nameof(routes));
             }
 
             if (pattern == null)
@@ -140,7 +140,7 @@ namespace Microsoft.AspNetCore.Builder
                 throw new ArgumentNullException(nameof(filePath));
             }
 
-            return builder.MapFallback(pattern, CreateRequestDelegate(builder, filePath));
+            return routes.MapFallback(pattern, CreateRequestDelegate(routes, filePath));
         }
 
         /// <summary>
@@ -148,7 +148,7 @@ namespace Microsoft.AspNetCore.Builder
         /// requests for non-filenames with the lowest possible priority. The request will be routed to a
         /// <see cref="StaticFileMiddleware"/> that attempts to serve the file specified by <paramref name="filePath"/>.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/>.</param>\
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/>.</param>\
         /// <param name="pattern">The route pattern.</param>
         /// <param name="filePath">The file path of the file to serve.</param>
         /// <param name="options"><see cref="StaticFileOptions"/> for the <see cref="StaticFileMiddleware"/>.</param>
@@ -169,14 +169,14 @@ namespace Microsoft.AspNetCore.Builder
         /// </para>
         /// </remarks>
         public static IEndpointConventionBuilder MapFallbackToFile(
-            this IEndpointRouteBuilder builder,
+            this IEndpointRouteBuilder routes,
             string pattern,
             string filePath,
             StaticFileOptions options)
         {
-            if (builder == null)
+            if (routes == null)
             {
-                throw new ArgumentNullException(nameof(builder));
+                throw new ArgumentNullException(nameof(routes));
             }
 
             if (pattern == null)
@@ -189,15 +189,15 @@ namespace Microsoft.AspNetCore.Builder
                 throw new ArgumentNullException(nameof(filePath));
             }
 
-            return builder.MapFallback(pattern, CreateRequestDelegate(builder, filePath, options));
+            return routes.MapFallback(pattern, CreateRequestDelegate(routes, filePath, options));
         }
 
         private static RequestDelegate CreateRequestDelegate(
-            IEndpointRouteBuilder builder,
+            IEndpointRouteBuilder routes,
             string filePath,
             StaticFileOptions options = null)
         {
-            var app = builder.CreateApplicationBuilder();
+            var app = routes.CreateApplicationBuilder();
             app.Use(next => context =>
             {
                 context.Request.Path = "/" + filePath;

src/Mvc/Mvc.Core/ref/Microsoft.AspNetCore.Mvc.Core.netcoreapp3.0.cs

@@ -5,8 +5,8 @@ namespace Microsoft.AspNetCore.Builder
 {
     public static partial class ControllerEndpointRouteBuilderExtensions
     {
-        public static void MapAreaControllerRoute(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string name, string areaName, string template, object defaults = null, object constraints = null, object dataTokens = null) { }
+        public static void MapAreaControllerRoute(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string name, string areaName, string pattern, object defaults = null, object constraints = null, object dataTokens = null) { }
-        public static void MapControllerRoute(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string name, string template, object defaults = null, object constraints = null, object dataTokens = null) { }
+        public static void MapControllerRoute(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string name, string pattern, object defaults = null, object constraints = null, object dataTokens = null) { }
         public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapControllers(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes) { throw null; }
         public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapDefaultControllerRoute(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes) { throw null; }
         public static void MapFallbackToAreaController(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string action, string controller, string area) { }

src/SignalR/common/Http.Connections/ref/Microsoft.AspNetCore.Http.Connections.netcoreapp3.0.cs

@@ -5,10 +5,10 @@ namespace Microsoft.AspNetCore.Builder
 {
     public static partial class ConnectionEndpointRouteBuilderExtensions
     {
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapConnectionHandler<TConnectionHandler>(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern) where TConnectionHandler : Microsoft.AspNetCore.Connections.ConnectionHandler { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapConnectionHandler<TConnectionHandler>(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern) where TConnectionHandler : Microsoft.AspNetCore.Connections.ConnectionHandler { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapConnectionHandler<TConnectionHandler>(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, System.Action<Microsoft.AspNetCore.Http.Connections.HttpConnectionDispatcherOptions> configureOptions) where TConnectionHandler : Microsoft.AspNetCore.Connections.ConnectionHandler { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapConnectionHandler<TConnectionHandler>(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, System.Action<Microsoft.AspNetCore.Http.Connections.HttpConnectionDispatcherOptions> configureOptions) where TConnectionHandler : Microsoft.AspNetCore.Connections.ConnectionHandler { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapConnections(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, Microsoft.AspNetCore.Http.Connections.HttpConnectionDispatcherOptions options, System.Action<Microsoft.AspNetCore.Connections.IConnectionBuilder> configure) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapConnections(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, Microsoft.AspNetCore.Http.Connections.HttpConnectionDispatcherOptions options, System.Action<Microsoft.AspNetCore.Connections.IConnectionBuilder> configure) { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapConnections(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, System.Action<Microsoft.AspNetCore.Connections.IConnectionBuilder> configure) { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapConnections(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, System.Action<Microsoft.AspNetCore.Connections.IConnectionBuilder> configure) { throw null; }
     }
     public static partial class ConnectionsAppBuilderExtensions
     {

src/SignalR/common/Http.Connections/src/ConnectionEndpointRouteBuilderExtensions.cs

@@ -18,34 +18,34 @@ namespace Microsoft.AspNetCore.Builder
         /// <summary>
         /// Maps incoming requests with the specified path to the provided connection pipeline.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="configure">A callback to configure the connection.</param>
         /// <returns>An <see cref="IEndpointConventionBuilder"/> for endpoints associated with the connections.</returns>
-        public static IEndpointConventionBuilder MapConnections(this IEndpointRouteBuilder builder, string pattern, Action<IConnectionBuilder> configure) =>
+        public static IEndpointConventionBuilder MapConnections(this IEndpointRouteBuilder routes, string pattern, Action<IConnectionBuilder> configure) =>
-            builder.MapConnections(pattern, new HttpConnectionDispatcherOptions(), configure);
+            routes.MapConnections(pattern, new HttpConnectionDispatcherOptions(), configure);
 
         /// <summary>
         /// Maps incoming requests with the specified path to the provided connection pipeline.
         /// </summary>
         /// <typeparam name="TConnectionHandler">The <see cref="ConnectionHandler"/> type.</typeparam>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <returns>An <see cref="IEndpointConventionBuilder"/> for endpoints associated with the connections.</returns>
-        public static IEndpointConventionBuilder MapConnectionHandler<TConnectionHandler>(this IEndpointRouteBuilder builder, string pattern) where TConnectionHandler : ConnectionHandler
+        public static IEndpointConventionBuilder MapConnectionHandler<TConnectionHandler>(this IEndpointRouteBuilder routes, string pattern) where TConnectionHandler : ConnectionHandler
         {
-            return builder.MapConnectionHandler<TConnectionHandler>(pattern, configureOptions: null);
+            return routes.MapConnectionHandler<TConnectionHandler>(pattern, configureOptions: null);
         }
 
         /// <summary>
         /// Maps incoming requests with the specified path to the provided connection pipeline.
         /// </summary>
         /// <typeparam name="TConnectionHandler">The <see cref="ConnectionHandler"/> type.</typeparam>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="configureOptions">A callback to configure dispatcher options.</param>
         /// <returns>An <see cref="IEndpointConventionBuilder"/> for endpoints associated with the connections.</returns>
-        public static IEndpointConventionBuilder MapConnectionHandler<TConnectionHandler>(this IEndpointRouteBuilder builder, string pattern, Action<HttpConnectionDispatcherOptions> configureOptions) where TConnectionHandler : ConnectionHandler
+        public static IEndpointConventionBuilder MapConnectionHandler<TConnectionHandler>(this IEndpointRouteBuilder routes, string pattern, Action<HttpConnectionDispatcherOptions> configureOptions) where TConnectionHandler : ConnectionHandler
         {
             var options = new HttpConnectionDispatcherOptions();
             // REVIEW: WE should consider removing this and instead just relying on the
@@ -57,7 +57,7 @@ namespace Microsoft.AspNetCore.Builder
             }
             configureOptions?.Invoke(options);
 
-            var conventionBuilder = builder.MapConnections(pattern, options, b =>
+            var conventionBuilder = routes.MapConnections(pattern, options, b =>
             {
                 b.UseConnectionHandler<TConnectionHandler>();
             });
@@ -79,16 +79,16 @@ namespace Microsoft.AspNetCore.Builder
         /// <summary>
         /// Maps incoming requests with the specified path to the provided connection pipeline.
         /// </summary>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="options">Options used to configure the connection.</param>
         /// <param name="configure">A callback to configure the connection.</param>
         /// <returns>An <see cref="IEndpointConventionBuilder"/> for endpoints associated with the connections.</returns>
-        public static IEndpointConventionBuilder MapConnections(this IEndpointRouteBuilder builder, string pattern, HttpConnectionDispatcherOptions options, Action<IConnectionBuilder> configure)
+        public static IEndpointConventionBuilder MapConnections(this IEndpointRouteBuilder routes, string pattern, HttpConnectionDispatcherOptions options, Action<IConnectionBuilder> configure)
         {
-            var dispatcher = builder.ServiceProvider.GetRequiredService<HttpConnectionDispatcher>();
+            var dispatcher = routes.ServiceProvider.GetRequiredService<HttpConnectionDispatcher>();
 
-            var connectionBuilder = new ConnectionBuilder(builder.ServiceProvider);
+            var connectionBuilder = new ConnectionBuilder(routes.ServiceProvider);
             configure(connectionBuilder);
             var connectionDelegate = connectionBuilder.Build();
 
@@ -98,21 +98,21 @@ namespace Microsoft.AspNetCore.Builder
             var conventionBuilders = new List<IEndpointConventionBuilder>();
 
             // Build the negotiate application
-            var app = builder.CreateApplicationBuilder();
+            var app = routes.CreateApplicationBuilder();
             app.UseWebSockets();
             app.Run(c => dispatcher.ExecuteNegotiateAsync(c, options));
             var negotiateHandler = app.Build();
 
-            var negotiateBuilder = builder.Map(pattern + "/negotiate", negotiateHandler);
+            var negotiateBuilder = routes.Map(pattern + "/negotiate", negotiateHandler);
             conventionBuilders.Add(negotiateBuilder);
 
             // build the execute handler part of the protocol
-            app = builder.CreateApplicationBuilder();
+            app = routes.CreateApplicationBuilder();
             app.UseWebSockets();
             app.Run(c => dispatcher.ExecuteAsync(c, options, connectionDelegate));
             var executehandler = app.Build();
 
-            var executeBuilder = builder.Map(pattern, executehandler);
+            var executeBuilder = routes.Map(pattern, executehandler);
             conventionBuilders.Add(executeBuilder);
 
             var compositeConventionBuilder = new CompositeEndpointConventionBuilder(conventionBuilders);

src/SignalR/server/SignalR/ref/Microsoft.AspNetCore.SignalR.netcoreapp3.0.cs

@@ -5,8 +5,8 @@ namespace Microsoft.AspNetCore.Builder
 {
     public static partial class HubEndpointRouteBuilderExtensions
     {
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapHub<THub>(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern) where THub : Microsoft.AspNetCore.SignalR.Hub { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapHub<THub>(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern) where THub : Microsoft.AspNetCore.SignalR.Hub { throw null; }
-        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapHub<THub>(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder builder, string pattern, System.Action<Microsoft.AspNetCore.Http.Connections.HttpConnectionDispatcherOptions> configureOptions) where THub : Microsoft.AspNetCore.SignalR.Hub { throw null; }
+        public static Microsoft.AspNetCore.Builder.IEndpointConventionBuilder MapHub<THub>(this Microsoft.AspNetCore.Routing.IEndpointRouteBuilder routes, string pattern, System.Action<Microsoft.AspNetCore.Http.Connections.HttpConnectionDispatcherOptions> configureOptions) where THub : Microsoft.AspNetCore.SignalR.Hub { throw null; }
     }
     public static partial class SignalRAppBuilderExtensions
     {

src/SignalR/server/SignalR/src/HubEndpointRouteBuilderExtensions.cs

@@ -17,25 +17,25 @@ namespace Microsoft.AspNetCore.Builder
         /// Maps incoming requests with the specified path to the specified <see cref="Hub"/> type.
         /// </summary>
         /// <typeparam name="THub">The <see cref="Hub"/> type to map requests to.</typeparam>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <returns>An <see cref="IEndpointConventionBuilder"/> for endpoints associated with the connections.</returns>
-        public static IEndpointConventionBuilder MapHub<THub>(this IEndpointRouteBuilder builder, string pattern) where THub : Hub
+        public static IEndpointConventionBuilder MapHub<THub>(this IEndpointRouteBuilder routes, string pattern) where THub : Hub
         {
-            return builder.MapHub<THub>(pattern, configureOptions: null);
+            return routes.MapHub<THub>(pattern, configureOptions: null);
         }
 
         /// <summary>
         /// Maps incoming requests with the specified path to the specified <see cref="Hub"/> type.
         /// </summary>
         /// <typeparam name="THub">The <see cref="Hub"/> type to map requests to.</typeparam>
-        /// <param name="builder">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
+        /// <param name="routes">The <see cref="IEndpointRouteBuilder"/> to add the route to.</param>
         /// <param name="pattern">The route pattern.</param>
         /// <param name="configureOptions">A callback to configure dispatcher options.</param>
         /// <returns>An <see cref="IEndpointConventionBuilder"/> for endpoints associated with the connections.</returns>
-        public static IEndpointConventionBuilder MapHub<THub>(this IEndpointRouteBuilder builder, string pattern, Action<HttpConnectionDispatcherOptions> configureOptions) where THub : Hub
+        public static IEndpointConventionBuilder MapHub<THub>(this IEndpointRouteBuilder routes, string pattern, Action<HttpConnectionDispatcherOptions> configureOptions) where THub : Hub
         {
-            var marker = builder.ServiceProvider.GetService<SignalRMarkerService>();
+            var marker = routes.ServiceProvider.GetService<SignalRMarkerService>();
 
             if (marker == null)
             {
@@ -54,7 +54,7 @@ namespace Microsoft.AspNetCore.Builder
 
             configureOptions?.Invoke(options);
 
-            var conventionBuilder = builder.MapConnections(pattern, options, b =>
+            var conventionBuilder = routes.MapConnections(pattern, options, b =>
             {
                 b.UseHub<THub>();
             });