A CLR Exception is a type of Exception made by .NET applications. The exception is encapsulated in a class derived from the System.Exception class. The Exception Code is 0xE0434352 (a.k.a. Error "CCR" in ASCII). The first Exception Parameter (0) is the HRESULT of the error. Follow these steps when debugging these issues with the Debugging Tools for Windows: .exr -1Exception CodeParameter[0] - HRESULT!sos.peException object - address of class instanceException type - Class name of the exceptionMessage - String description of the exceptionInner Exception - Address of the inner exceptionStack Trace!sos.do Members of the classFor example, the System.IO.FileNotFoundException class has _fileName and _fusionLog members that (sometimes) specify the missing file and/or the CLR Logging of Assembly Load issues (Fusion Logging). Additional Resources: Inside - .exrInside - Windows SDKMicrosoft Docs - Debugging Tools for Windows