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NETLink Symbol

$NETExceptionHandler

$NETExceptionHandler
allows you to control how exceptions thrown in .NET are handled in Mathematica.

To use $NETExceptionHandler, you first need to load .NET/Link using Needs["NETLink`"].

The default behavior is for exceptions to appear as messages in Mathematica. To override this behavior (e.g., to temporarily silence messages from exceptions), assign a value to $NETExceptionHandler.

The value of $NETExceptionHandler is treated as a function that will be passed 3 arguments:

	symbol associated with the message	usually the symbol NET
	message tag	typically "netexceptn" or "netpexceptn"
	string description	a descriptive string associated with the exception

The tag "netexceptn" generally is used for a typical exception, while the tag "netpexceptn" is used for exceptions generated by a manual return, where the exception occurs after the function has sent its result back to Mathematica.

You can use GetNETException in a handler function to obtain the .NET exception object manually.

Needs["NETLink`"]