diff --git a/src/SignalR/server/Core/ref/Microsoft.AspNetCore.SignalR.Core.netcoreapp.cs b/src/SignalR/server/Core/ref/Microsoft.AspNetCore.SignalR.Core.netcoreapp.cs
index 54b22b97b7..f23da84b52 100644
--- a/src/SignalR/server/Core/ref/Microsoft.AspNetCore.SignalR.Core.netcoreapp.cs
+++ b/src/SignalR/server/Core/ref/Microsoft.AspNetCore.SignalR.Core.netcoreapp.cs
@@ -84,6 +84,7 @@ namespace Microsoft.AspNetCore.SignalR
     }
     public static partial class HubClientsExtensions
     {
+        public static T AllExcept<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, System.Collections.Generic.IEnumerable<string> excludedConnectionIds) { throw null; }
         public static T AllExcept<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string excludedConnectionId1) { throw null; }
         public static T AllExcept<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string excludedConnectionId1, string excludedConnectionId2) { throw null; }
         public static T AllExcept<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string excludedConnectionId1, string excludedConnectionId2, string excludedConnectionId3) { throw null; }
@@ -92,6 +93,7 @@ namespace Microsoft.AspNetCore.SignalR
         public static T AllExcept<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string excludedConnectionId1, string excludedConnectionId2, string excludedConnectionId3, string excludedConnectionId4, string excludedConnectionId5, string excludedConnectionId6) { throw null; }
         public static T AllExcept<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string excludedConnectionId1, string excludedConnectionId2, string excludedConnectionId3, string excludedConnectionId4, string excludedConnectionId5, string excludedConnectionId6, string excludedConnectionId7) { throw null; }
         public static T AllExcept<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string excludedConnectionId1, string excludedConnectionId2, string excludedConnectionId3, string excludedConnectionId4, string excludedConnectionId5, string excludedConnectionId6, string excludedConnectionId7, string excludedConnectionId8) { throw null; }
+        public static T Clients<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, System.Collections.Generic.IEnumerable<string> connectionIds) { throw null; }
         public static T Clients<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string connection1) { throw null; }
         public static T Clients<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string connection1, string connection2) { throw null; }
         public static T Clients<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string connection1, string connection2, string connection3) { throw null; }
@@ -100,6 +102,7 @@ namespace Microsoft.AspNetCore.SignalR
         public static T Clients<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string connection1, string connection2, string connection3, string connection4, string connection5, string connection6) { throw null; }
         public static T Clients<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string connection1, string connection2, string connection3, string connection4, string connection5, string connection6, string connection7) { throw null; }
         public static T Clients<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string connection1, string connection2, string connection3, string connection4, string connection5, string connection6, string connection7, string connection8) { throw null; }
+        public static T GroupExcept<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string groupName, System.Collections.Generic.IEnumerable<string> excludedConnectionIds) { throw null; }
         public static T GroupExcept<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string groupName, string excludedConnectionId1) { throw null; }
         public static T GroupExcept<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string groupName, string excludedConnectionId1, string excludedConnectionId2) { throw null; }
         public static T GroupExcept<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string groupName, string excludedConnectionId1, string excludedConnectionId2, string excludedConnectionId3) { throw null; }
@@ -108,6 +111,7 @@ namespace Microsoft.AspNetCore.SignalR
         public static T GroupExcept<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string groupName, string excludedConnectionId1, string excludedConnectionId2, string excludedConnectionId3, string excludedConnectionId4, string excludedConnectionId5, string excludedConnectionId6) { throw null; }
         public static T GroupExcept<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string groupName, string excludedConnectionId1, string excludedConnectionId2, string excludedConnectionId3, string excludedConnectionId4, string excludedConnectionId5, string excludedConnectionId6, string excludedConnectionId7) { throw null; }
         public static T GroupExcept<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string groupName, string excludedConnectionId1, string excludedConnectionId2, string excludedConnectionId3, string excludedConnectionId4, string excludedConnectionId5, string excludedConnectionId6, string excludedConnectionId7, string excludedConnectionId8) { throw null; }
+        public static T Groups<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, System.Collections.Generic.IEnumerable<string> groupNames) { throw null; }
         public static T Groups<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string group1) { throw null; }
         public static T Groups<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string group1, string group2) { throw null; }
         public static T Groups<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string group1, string group2, string group3) { throw null; }
@@ -116,6 +120,7 @@ namespace Microsoft.AspNetCore.SignalR
         public static T Groups<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string group1, string group2, string group3, string group4, string group5, string group6) { throw null; }
         public static T Groups<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string group1, string group2, string group3, string group4, string group5, string group6, string group7) { throw null; }
         public static T Groups<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string group1, string group2, string group3, string group4, string group5, string group6, string group7, string group8) { throw null; }
+        public static T Users<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, System.Collections.Generic.IEnumerable<string> userIds) { throw null; }
         public static T Users<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string user1) { throw null; }
         public static T Users<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string user1, string user2) { throw null; }
         public static T Users<T>(this Microsoft.AspNetCore.SignalR.IHubClients<T> hubClients, string user1, string user2, string user3) { throw null; }
diff --git a/src/SignalR/server/Core/src/HubClientsExtensions.cs b/src/SignalR/server/Core/src/HubClientsExtensions.cs
index 8936bbc979..8f29cb89f3 100644
--- a/src/SignalR/server/Core/src/HubClientsExtensions.cs
+++ b/src/SignalR/server/Core/src/HubClientsExtensions.cs
@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System.Collections.Generic;
+using System.Linq;
 
 namespace Microsoft.AspNetCore.SignalR
 {
@@ -126,6 +127,17 @@ namespace Microsoft.AspNetCore.SignalR
             return hubClients.AllExcept(new [] { excludedConnectionId1, excludedConnectionId2, excludedConnectionId3, excludedConnectionId4, excludedConnectionId5, excludedConnectionId6, excludedConnectionId7, excludedConnectionId8 });
         }
 
+        /// <summary>
+        /// Gets a <typeparamref name="T" /> that can be used to invoke methods on all clients connected to the hub excluding the specified connections.
+        /// </summary>
+        /// <param name="hubClients">The abstraction that provides access to connections.</param>
+        /// <param name="excludedConnectionIds">The connection IDs to exclude.</param>
+        /// <returns>A <typeparamref name="T" /> representing the methods that can be invoked on the clients.</returns>
+        public static T AllExcept<T>(this IHubClients<T> hubClients, IEnumerable<string> excludedConnectionIds)
+        {
+            return hubClients.AllExcept(excludedConnectionIds.ToList());
+        }
+
         /// <summary>
         /// Gets a <typeparamref name="T" /> that can be used to invoke methods on the specified connections.
         /// </summary>
@@ -242,6 +254,17 @@ namespace Microsoft.AspNetCore.SignalR
             return hubClients.Clients(new [] { connection1, connection2, connection3, connection4, connection5, connection6, connection7, connection8 });
         }
 
+        /// <summary>
+        /// Gets a <typeparamref name="T" /> that can be used to invoke methods on the specified connections.
+        /// </summary>
+        /// <param name="hubClients">The abstraction that provides access to connections.</param>
+        /// <param name="connectionIds">The connection IDs.</param>
+        /// <returns>A <typeparamref name="T" /> representing the methods that can be invoked on the clients.</returns>
+        public static T Clients<T>(this IHubClients<T> hubClients, IEnumerable<string> connectionIds)
+        {
+            return hubClients.Clients(connectionIds.ToList());
+        }
+
         /// <summary>
         /// Gets a <typeparamref name="T" /> that can be used to invoke methods on all connections in all of the specified groups.
         /// </summary>
@@ -358,6 +381,17 @@ namespace Microsoft.AspNetCore.SignalR
             return hubClients.Groups(new [] { group1, group2, group3, group4, group5, group6, group7, group8 });
         }
 
+        /// <summary>
+        /// Gets a <typeparamref name="T" /> that can be used to invoke methods on all connections in all of the specified groups.
+        /// </summary>
+        /// <param name="hubClients">The abstraction that provides access to connections.</param>
+        /// <param name="groupNames">The group names.</param>
+        /// <returns>A <typeparamref name="T" /> representing the methods that can be invoked on the clients.</returns>
+        public static T Groups<T>(this IHubClients<T> hubClients, IEnumerable<string> groupNames)
+        {
+            return hubClients.Groups(groupNames.ToList());
+        }
+
         /// <summary>
         /// Gets a <typeparamref name="T" /> that can be used to invoke methods on all connections in the specified group excluding the specified connections.
         /// </summary>
@@ -482,6 +516,18 @@ namespace Microsoft.AspNetCore.SignalR
             return hubClients.GroupExcept(groupName, new [] { excludedConnectionId1, excludedConnectionId2, excludedConnectionId3, excludedConnectionId4, excludedConnectionId5, excludedConnectionId6, excludedConnectionId7, excludedConnectionId8 });
         }
 
+        /// <summary>
+        /// Gets a <typeparamref name="T" /> that can be used to invoke methods on all connections in the specified group excluding the specified connections.
+        /// </summary>
+        /// <param name="hubClients">The abstraction that provides access to connections.</param>
+        /// <param name="groupName">The group name.</param>
+        /// <param name="excludedConnectionIds">The connection IDs to exclude.</param>
+        /// <returns>A <typeparamref name="T" /> representing the methods that can be invoked on the clients.</returns>
+        public static T GroupExcept<T>(this IHubClients<T> hubClients, string groupName, IEnumerable<string> excludedConnectionIds)
+        {
+            return hubClients.GroupExcept(groupName, excludedConnectionIds.ToList());
+        }
+
         /// <summary>
         /// Gets a <typeparamref name="T" /> that can be used to invoke methods on all connections associated with all of the specified users.
         /// </summary>
@@ -597,5 +643,16 @@ namespace Microsoft.AspNetCore.SignalR
         {
             return hubClients.Users(new [] { user1, user2, user3, user4, user5, user6, user7, user8 });
         }
+
+        /// <summary>
+        /// Gets a <typeparamref name="T" /> that can be used to invoke methods on all connections associated with all of the specified users.
+        /// </summary>
+        /// <param name="hubClients">The abstraction that provides access to connections.</param>
+        /// <param name="userIds">The user IDs.</param>
+        /// <returns>A <typeparamref name="T" /> representing the methods that can be invoked on the clients.</returns>
+        public static T Users<T>(this IHubClients<T> hubClients, IEnumerable<string> userIds)
+        {
+            return hubClients.Users(userIds.ToList());
+        }
     }
 }