Fixed generic components with fully qualified names (dotnet/aspnetcore-tooling#356)

\n\nCommit migrated from b7392f1f84

src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions.Version1_X/src/CSharpIdentifier.cs

@@ -53,6 +53,11 @@ namespace Microsoft.AspNetCore.Mvc.Razor.Extensions.Version1_X
 
         public static string SanitizeClassName(string inputName)
         {
+            if (string.IsNullOrEmpty(inputName))
+            {
+                return inputName;
+            }
+
             if (!IsIdentifierStart(inputName[0]) && IsIdentifierPart(inputName[0]))
             {
                 inputName = "_" + inputName;

src/Razor/Microsoft.AspNetCore.Mvc.Razor.Extensions.Version2_X/src/CSharpIdentifier.cs

@@ -53,6 +53,11 @@ namespace Microsoft.AspNetCore.Mvc.Razor.Extensions.Version2_X
 
         public static string SanitizeClassName(string inputName)
         {
+            if (string.IsNullOrEmpty(inputName))
+            {
+                return inputName;
+            }
+
             if (!IsIdentifierStart(inputName[0]) && IsIdentifierPart(inputName[0]))
             {
                 inputName = "_" + inputName;

src/Razor/Microsoft.AspNetCore.Razor.Language/src/CSharpIdentifier.cs

@@ -35,6 +35,11 @@ namespace Microsoft.AspNetCore.Razor.Language
 
         public static string SanitizeIdentifier(string inputName)
         {
+            if (string.IsNullOrEmpty(inputName))
+            {
+                return inputName;
+            }
+
             if (!IsIdentifierStart(inputName[0]) && IsIdentifierPart(inputName[0]))
             {
                 inputName = "_" + inputName;

src/Razor/Microsoft.AspNetCore.Razor.Language/src/Components/ComponentGenericTypePass.cs

@@ -275,7 +275,7 @@ namespace Microsoft.AspNetCore.Razor.Language.Components
 
                     // Method name is generated and guaranteed not to collide, since it's unique for each
                     // component call site.
-                    MethodName = $"Create{node.TagName}_{_id++}",
+                    MethodName = $"Create{CSharpIdentifier.SanitizeIdentifier(node.TagName)}_{_id++}",
                     FullTypeName = @namespace + ".TypeInference",
                 };