Fix typo. Add exclusion files.

Author: Tratcher

src/Microsoft.AspNetCore.Http.Features/IHeaderDictionary.cs

@@ -19,7 +19,7 @@ public interface IHeaderDictionary : IDictionary<string, StringValues>
         new StringValues this[string key] { get; set; }
 
         /// <summary>
-        /// Strongly typed access to the Content-Type header. Implementations must keep this in sync with the string representation.
+        /// Strongly typed access to the Content-Length header. Implementations must keep this in sync with the string representation.
         /// </summary>
         long? ContentLength { get; set; }
     }

src/Microsoft.AspNetCore.Http.Features/exceptions.net45.json

@@ -0,0 +1,14 @@
+[
+  {
+    "OldTypeId": "public interface Microsoft.AspNetCore.Http.IHeaderDictionary : System.Collections.Generic.IDictionary<System.String, Microsoft.Extensions.Primitives.StringValues>",
+    "NewTypeId": "public interface Microsoft.AspNetCore.Http.IHeaderDictionary : System.Collections.Generic.IDictionary<System.String, Microsoft.Extensions.Primitives.StringValues>",
+    "NewMemberId": "System.Nullable<System.Int64> get_ContentLength()",
+    "Kind": "Addition"
+  },
+  {
+    "OldTypeId": "public interface Microsoft.AspNetCore.Http.IHeaderDictionary : System.Collections.Generic.IDictionary<System.String, Microsoft.Extensions.Primitives.StringValues>",
+    "NewTypeId": "public interface Microsoft.AspNetCore.Http.IHeaderDictionary : System.Collections.Generic.IDictionary<System.String, Microsoft.Extensions.Primitives.StringValues>",
+    "NewMemberId": "System.Void set_ContentLength(System.Nullable<System.Int64> value)",
+    "Kind": "Addition"
+  }
+]

src/Microsoft.AspNetCore.Http.Features/exceptions.netcore.json

@@ -0,0 +1,14 @@
+[
+  {
+    "OldTypeId": "public interface Microsoft.AspNetCore.Http.IHeaderDictionary : System.Collections.Generic.IDictionary<System.String, Microsoft.Extensions.Primitives.StringValues>",
+    "NewTypeId": "public interface Microsoft.AspNetCore.Http.IHeaderDictionary : System.Collections.Generic.IDictionary<System.String, Microsoft.Extensions.Primitives.StringValues>",
+    "NewMemberId": "System.Nullable<System.Int64> get_ContentLength()",
+    "Kind": "Addition"
+  },
+  {
+    "OldTypeId": "public interface Microsoft.AspNetCore.Http.IHeaderDictionary : System.Collections.Generic.IDictionary<System.String, Microsoft.Extensions.Primitives.StringValues>",
+    "NewTypeId": "public interface Microsoft.AspNetCore.Http.IHeaderDictionary : System.Collections.Generic.IDictionary<System.String, Microsoft.Extensions.Primitives.StringValues>",
+    "NewMemberId": "System.Void set_ContentLength(System.Nullable<System.Int64> value)",
+    "Kind": "Addition"
+  }
+]