37 lines
1.2 KiB
Markdown
37 lines
1.2 KiB
Markdown
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## Workflow now throws original exception instead of NullReferenceException in some cases
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### Scope
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Minor
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### Version Introduced
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4.7
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### Source Analyzer Status
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NotPlanned
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### Change Description
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In the .NET Framework 4.6.2 and earlier versions, when the Execute method of a workflow activity
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throws an exception with a `null` value for the `P:System.Exception.Message` property, the
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System.Activities Workflow runtime throws a `NullReferenceException`, masking the original
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exception.
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In the .NET Framework 4.7, the previously masked exception is thrown.
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- [ ] Quirked
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- [ ] Build-time break
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### Recommended Action
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If your code relies on handling the `NullReferenceException`, change it to catch the exceptions
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that could be thrown from your custom activities.
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### Affected APIs
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* `M:System.Activities.CodeActivity.Execute(System.Activities.CodeActivityContext)`
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* `M:System.Activities.AsyncCodeActivity.BeginExecute(System.Activities.AsyncCodeActivityContext,System.AsyncCallback,System.Object)`
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* `M:System.Activities.AsyncCodeActivity`1.BeginExecute(System.Activities.AsyncCodeActivityContext,System.AsyncCallback,System.Object)`
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* `M:System.Activities.WorkflowInvoker.Invoke`
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### Category
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Windows Workflow Foundation (WF)
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<!-- breaking change id: 170 -->
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