c# - C# 中的 NativeMethods 类有什么作用？

Question

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Answer 1

本文的 Visual Studio 2012 版本包含更多解释，

http://msdn.microsoft.com/en-us/library/ms182161(v=vs.110).aspx

To fix a violation of this rule, move the method to the appropriate NativeMethods class. For most applications, moving P/Invokes to a new class that is named NativeMethods is enough.

However, if you are developing libraries for use in other applications, you should consider defining two other classes that are called SafeNativeMethods and UnsafeNativeMethods. These classes resemble the NativeMethods class; however, they are marked by using a special attribute called SuppressUnmanagedCodeSecurityAttribute. When this attribute is applied, the runtime does not perform a full stack walk to make sure that all callers have the UnmanagedCode permission. The runtime ordinarily checks for this permission at startup. Because the check is not performed, it can greatly improve performance for calls to these unmanaged methods, It also enables code that has limited permissions to call these methods.

However, you should use this attribute with great care. It can have serious security implications if it is implemented incorrectly..

For information about how to implement the methods, see the NativeMethods Example, SafeNativeMethods Example, and UnsafeNativeMethods Example.