C＃预处理程序宏替代

Question

I'm wrapping a native library with hundreds of function and its totally annoying to type that DllImport above all of those functions.

Is there a way to avoid writing these ugly/repeated attributes above every function ?

public const string NativeDll = "mynativelib.dll";

[DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl)]
public static extern void foo1();

[DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl)]
public static extern void foo2();

[DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl)]
public static extern void foo3();

[DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl)]
public static extern void foo4();

...

[DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl)]
public static extern void fooN();

Answer 1

C# does not have a pre-processor, so the simple answer to your question is that it is not possible to avoid writing the attribute for every p/invoke declaration.

Now, you could write your own pre-processor or script to generate these p/invoke declarations. I'm not convinced that would be worth the effort since p/invoke declarations tend to get written once only and require no maintenance.