Multiple profilers of managed code on the same machine. Why it is bad?

It may happen that when you try to attach Visual Studio profiler to a managed application, you get the following error: Error VSP1336 : Could not attach to process ID:1234 MyProcess.exe. Wrong setting of COR_PROFILER environment variable in target process.  Please use VSPerfClrEnv.cmd to set environment variables correctly. You follow the instructions precisely, use VSPerfClrEnv.cmd…

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