THRIFT-2354 Connection errors can lead to case_clause exceptions

Patch: Anthony Molinaro
THRIFT-2339 Uncaught exception in thrift c# driver

Patch: Janis Ser
Github Pull Request: This closes #79
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commit d650ca3380aac39eae1f17dc72d4097eb3394562
Author: JSSTR <janis.sermulins@struq.com>
Date:   2014-01-29T13:49:51Z

    Update TSocket.cs

    Make sure to catch all exceptions in the ConnectCallback.

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