How to: View Profiling Tools Performance Warnings

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The performance warnings of the Visual Studio Profiling Tools Profiling Tools indicate issues in a profiled application that can slow program execution. Warnings can also indicate that you might want to change collection methods to collect more useful data. Performance warnings are generated automatically in a profiling session and appear in the Error List window when a profiling data file is opened in the Visual Studio IDE. 

If the Error List window does not appear when you open a profiling data file, click the View menu, and then click Error List.