This article describes how RadDiagnostics can be used to get a screenshot with the state of the application right before the exception occurred.
The diagnostic report provided by RadDiagnostics can be extended with a screenshot of the application as it is right before the exception occurs.
Enabling and disabling of this feature is done by the IncludeScreenshot property. When it is set to true, the report will contain a base64 representation of the image.
Various sources can be used for decoding the image. One of them can be found