Throw an Error in an MSBuild Task

How do you throw an error from within a开发者_开发问答n MSBuild task and force the build to fail. Something like:

<Task>
  <ThrowError Condition="$(SomeCondition)" Message="There was a problem with the build" />
</Task>

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Use the Error Task

<Error Condition="$(SomeCondition)" Text="There was a problem with the build" />

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The Error-task would do the trick.

<Error
            Text="errormessage"
            Condition="errorcondition" />

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Have you tried Error instead of ThrowError ? It works for me ;)