what's the purpose for vshost file?

开发者_如何转开发Under Visual studio, I found the console program is actually ***vshost.exe, I would like to know the purpose of this file?

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The hosting process is a feature in Visual Studio 2005 that improves debugging performance, enables partial trust debugging, and enables design time expression evaluation. The hosting process files contain vshost in the file name and are placed in the output folder of your project.

http://msdn.microsoft.com/en-us/library/ms185331(VS.80).aspx

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Those are used when the application is started from within Visual Studio. It's for the interaction with the IDE, it's not needed when you run the application on it's own.