How to turn off Visual Studio 2015 Roslyn error highlighting? -

for resharper can selectively turn on/off, not find way turn off built-in visual studio 2015 code highlights/suggestions.

the reason want because have quite few left-join linqs , these queries messed visual studio.

i seeing lots of squiggles on linqs , prefer turn them off.

here 1 of error talking about.. have no idea how rid of it.

the result of expression 'true' since value of type 'int' never equal 'null' of type 'int?'

edit

i have found way fix scottgu's blog here: the c# ?? null coalescing operator (and using linq)

if talking code analysis rules. under project references, there analyzers node.

if right click , select "open active rule set", can turn off of analyzers don't want.