File filter without curley braces crashes visual stuido

[MoSkinny]

Hello,

I originally downloaded the roslyn / .editorConfig file and found it caused this extension to crash and opened this issue: dotnet/roslyn#17914

From that discussion it sounds like [.cs] should be a valid file filter.

Steps to Reproduce:
Install the EditorConfig extension for VS 2015
Place the roslyn / .editorconfig file in the solution folder
Open the solution in VS 2015

Expected Behavior:
Visual studio doesn't crash due to the missing curly braces in the [.cs] file type filter under the CSharp code style settings: section. The file filter [.cs] should be [*.{cs}]

Actual Behavior:
Microsoft Visual Studio 2015 has stopped working