如何禁止关闭操作系统\App.ico
....................\AssemblyInfo.cs
....................\bin\Release\System.exe
....................\Form1.cs
....................\Form1.resx
....................\Image.suo
....................\MoveWindow.suo
....................\obj\Debug\System.projdata
....................\...\Release\System.exe
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....................\...\.......\WMI3.Class1.resources
....................\Show1.JPG
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....................\System.sln
....................\System.suo
....................\obj\Debug\temp
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....................\bin\Debug
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如何禁止关闭操作系统