MSBuild and Visual Studio Known Error Message Formats
When a tool is executed that outputs some text, MSBuild will examine the text for errors and warnings. There is a known format that many tools use to report these messages. By default MSBuild will examine the text, and report errors and/or warnings based on the output. This behavior can be changed, or disabled, by using these parameters on the Exec task: IgnoreStandardErrorWarningFormat, CustomErrorRegularExpression, and CustomWarningRegularExpression. Most of the content here is based on an entry from the MSBuild Team blog, and is used with their permission.
Take a look at the following four messages, which are all properly formatted and will be recognized by MSBuild and Visual Studio.
Main.cs(17,20): ...
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