mono/mono — pull request #416 by martinpotter (2012-08-06 03:47:34+00:00)
Title: Fix for incorrect behavior of Guid.TryParse and Guid.TryParseExact. Bug Id: 6402

According to the MSDN documentation, http://msdn.microsoft.com/en-us/library/system.guid.tryparse.aspx and http://msdn.microsoft.com/en-us/library/system.guid.tryparseexact.aspx, Guid.TryParse and Guid.TryParseExact should "return false if input is null or not in a recognized format, and does not throw an exception."