Merge branch '22602-apiUtil-must-test-variable-nullity' of https://gi… #997

Job	Run time
Build .Net Standard projects (samples/client/petstore/csharp/generichost/standard2.0/Petstore/)	2m 9s
Build .Net Standard projects (samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSer...	2m 21s
Build .Net Standard projects (samples/client/petstore/csharp/restsharp/standard2.0/Petstore/)	2m 16s
Build .Net Standard projects (samples/client/petstore/csharp/httpclient/standard2.0/Petstore/)	2m 8s
	8m 54s

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