There is a webservice project written in VS2010 few years ago and the problem is all code exactly same (same PC , Tested with vs2010 and 2015 with the same code) but in vs2015 it gives error on debug mode. Options > "Projects & Solutions" settings are all same. I took this error and definition of it;
An unhandled exception of type 'System.StackOverflowException' occurred in System.Runtime.Serialization.dll
System.StackOverflowException was unhandled Message: An unhandled exception of type 'System.StackOverflowException' occurred in mscorlib.dll
Anyone have idea about it , I'm really glad to attention. I could't share code because it's nearly 30.000 lines.