Using specific exception types

src/Microsoft.AspNet.Server.Kestrel/Http/Frame.cs

@@ -613,7 +613,7 @@ namespace Microsoft.AspNet.Server.Kestrel.Http
                             consumed = scan;
                             return true;
                         }
-                        throw new Exception("Malformed request");
+                        throw new InvalidDataException("Malformed request");
                     }
 
                     while (

src/Microsoft.AspNet.Server.Kestrel/Http/MemoryPoolBlock2.cs

@@ -484,7 +484,7 @@ namespace Microsoft.AspNet.Server.Kestrel.Http
                     }
                     else if (block.Next == null)
                     {
-                        throw new Exception("end did not follow iterator");
+                        throw new InvalidOperationException("end did not follow iterator");
                     }
                     else
                     {

src/Microsoft.AspNet.Server.Kestrel/Http/MessageBody.cs

@@ -6,6 +6,7 @@ using System.Collections.Generic;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.Framework.Primitives;
+using System.IO;
 
 namespace Microsoft.AspNet.Server.Kestrel.Http
 {
@@ -167,7 +168,7 @@ namespace Microsoft.AspNet.Server.Kestrel.Http
                     }
                     if (input.RemoteIntakeFin)
                     {
-                        throw new Exception("Unexpected end of request content");
+                        throw new InvalidDataException("Unexpected end of request content");
                     }
                 }
             }