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Handling errors in the Microsoft Graph .NET Client Library

Errors in the Microsoft Graph .NET Client Library behave like errors returned from the Microsoft Graph service. You can read more about them here.

Anytime you make a request against the service there is the potential for an error. In the case of an error, the request will throw a ServiceException object with an inner Error object that contains the service error details.

Checking the error

There are a few different types of errors that can occur during a network call. These error codes are defined in GraphErrorCode.cs.

Checking the error code

You can easily check if an error has a specific code by calling IsMatch on the error code value. IsMatch is not case sensitive:

if (exception.IsMatch(GraphErrorCode.AccessDenied.ToString())
{
        // Handle access denied error
}

Each error object has a Message property as well as code. This message is for debugging purposes and is not be meant to be displayed to the user. Common error codes are defined in GraphErrorCode.cs.