Hosting Process (vshost.exe)_hostingprocess-优快云博客

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在.NET程序调试中，.vshost.exe进程用于提升调试性能、实现部分信任调试及设计时表达式评估。该进程创建应用域并与调试器关联，从而改善调试效率。

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.NET程序调试时，会伴随出现一个同名的.vshost.exe进程，这是做什么的？在MSDN上有如下解释。Hosting Process (vshost.exe)

这个进程是为了帮助调试用的，只会启动一次，直到工程被关闭才会停止运行。真正要调试的进程是通过这个进程启动起来。如要禁止使用Host进程，可以参照这里。

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. For more information, see Debugging and the Hosting Process.

Note
Hosting process files (.vshost.exe) are for use by Visual Studio 2005 and should not be run directly or deployed with your application..

Improved Debugging Performance

The hosting process creates an application domain and associates the debugger with the application. Performing these tasks can introduce a noticeable delay between the time debugging is started and the time the application begins running. The hosting process helps increase performance by creating the application domain and associating the debugger in the background, and saving the application domain and debugger state between runs of the application. For more information on application domains, see Application Domains.

Partial Trust Debugging

An application can be specified as a partial trust application in the Security page of the Project Designer. Debugging a partial trust application requires special initialization of the application domain. This initialization is handled by the hosting process.

Design-Time Expression Evaluation

Design-time expression evaluation enables you to test code from the Immediate window without having to run the application. The hosting process executes this code during design time expression evaluation. For more information, see Immediate Window.