An existing connection was forcibly closed by the remote host while Requesting Azure Token

Hi,

I am getting the below issue while requesting token from Azure Access control Service.

System.Net.WebException was unhandled by user code
  Message=The underlying connection was closed: An unexpected error occurred on a send.
  Source=System
  StackTrace:
       at System.Net.WebClient.UploadValues(Uri address, String method, NameValueCollection data)
       at System.Net.WebClient.UploadValues(String address, String method, NameValueCollection data)
      at System.Data.Services.Client.DataServiceContext.CreateRequest(Uri requestUri, String method, Boolean allowAnyType, String contentType, Version requestVersion, Boolean sendChunked)
       at System.Data.Services.Client.DataServiceRequest.CreateResult(Object source, DataServiceContext context, AsyncCallback callback, Object state)
       at System.Data.Services.Client.DataServiceRequest.Execute[TElement](DataServiceContext context, QueryComponents queryComponents)
  InnerException: System.IO.IOException
       Message=Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
       Source=System
       StackTrace:
            at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
            at System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count)
            at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)
            at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)
            at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)
            at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest)
            at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult)
            at System.Net.TlsStream.CallProcessAuthentication(Object state)
            at System.Threading.ExecutionContext.runTryCode(Object userData)
            at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
            at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
            at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
            at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
            at System.Net.TlsStream.ProcessAuthentication(LazyAsyncResult result)
            at System.Net.TlsStream.Write(Byte[] buffer, Int32 offset, Int32 size)
            at System.Net.PooledStream.Write(Byte[] buffer, Int32 offset, Int32 size)
            at System.Net.ConnectStream.WriteHeaders(Boolean async)
       InnerException: System.Net.Sockets.SocketException
            Message=An existing connection was forcibly closed by the remote host
            Source=System
            ErrorCode=10054
            NativeErrorCode=10054
            StackTrace:
                 at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
                 at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
            InnerException: