C#: Catch exceptions by name.

git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665631 13f79535-47bb-0310-9956-ffa450edef68

lib/csharp/src/Server/TSimpleServer.cs

@@ -85,7 +85,7 @@ namespace Thrift.Server
 						while (processor.Process(inputProtocol, outputProtocol)) { }
 					}
 				}
-				catch (TTransportException ttx)
+				catch (TTransportException)
 				{
 					// Client died, just move on
 				}

lib/csharp/src/Server/TThreadPoolServer.cs

@@ -140,7 +140,7 @@ namespace Thrift.Server
 					//keep processing requests until client disconnects
 				}
 			}
-			catch (TTransportException ttx)
+			catch (TTransportException)
 			{
 				// Assume the client died and continue silently
 			}

lib/csharp/src/Transport/TServerSocket.cs

@@ -70,7 +70,7 @@ namespace Thrift.Transport
 				// Make server socket
 				server = new TcpListener(System.Net.IPAddress.Any, this.port);
 			}
-			catch (Exception e)
+			catch (Exception)
 			{
 				server = null;
 				throw new TTransportException("Could not create ServerSocket on port " + port + ".");