Repro in VS2015 Update 1 (not sure if others are affected):
In src\Compilers\CSharp\Portable\Binder\Binder_Symbols.cs, add the following on line 1835:
Now select the ternary expression just above it (between return and ;). Do Refactor, Extract Method.
An error dialog appears, stating 'Unexpected Null'.

Close the dialog, and open another a file. This file's editor is now seemingly readonly (till you close and re-open again).
Not sure if this is caused by Roslyn.
Repro in VS2015 Update 1 (not sure if others are affected):
In
src\Compilers\CSharp\Portable\Binder\Binder_Symbols.cs, add the following on line 1835:Now select the ternary expression just above it (between
returnand;). Do Refactor, Extract Method.An error dialog appears, stating 'Unexpected Null'.
Close the dialog, and open another a file. This file's editor is now seemingly readonly (till you close and re-open again).
Not sure if this is caused by Roslyn.