Managed Debugging Assistant 'FatalExecutionEngineError' has detected a problem in 'C:\Program Files (x86)\IIS Express\iisexpress.exe'

I got below message when I run the debug mode of visual studio 2015. It was running fine before.

Managed Debugging Assistant 'FatalExecutionEngineError' 
has detected a problem in 'C:\Program Files (x86)\IIS Express\iisexpress.exe'

Additional information: The runtime has encountered a fatal error. 
The address of the error was at 0x6caac430, on thread 0x24e0. The error code is 0xc0000005. 
This error may be a bug in the CLR or in the unsafe or non-verifiable 
portions of user code. Common sources of this bug include user marshaling errors for 
COM-interop or PInvoke, which may corrupt the stack.

I have tried changing the targeting platform to x86 and x64, no luck. I hope someone can offer me more solutions that I can try. Thanks a lot.