Managed Debugging Assistant 'FatalExecutionEngineError' has detected a problem [32bit to 64bit]

Managed Debugging Assistant 'FatalExecutionEngineError' has detected a problem in 'E:\AO03\OBT_AO03_64bit_2010\bin\Debug\OBT_AO03.vshost.exe'. Additional Information: The runtime has encountered a fatal error. The address of the error was at 0xf5f3bc24, on thread 0x2ad4. 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.

SAP B1 and VB.Net 2010