Logger.LogMessage logs a message mutliple times

[AbhitejJohn]

Steps to reproduce

This came in from a user on a blog post. Add the following piece of code to a TestMethod and run it.

Logger.LogMessage("Hello World");

Expected behavior

Logs "Hello World" to the standard output stream.

Actual behavior

"Hello World" is logged twice to the Standard output and error streams!!

Environment

Scenario: VS IDE.
MSTest.TestFramework: 1.1.11
MSTest.TestAdapter: 1.1.11