C# equivalent of DllMain in C (WinAPI)

Question

I have an older app (ca. 2005) which accepts dll plugins. The app was originally designed for Win32 C plugins, but I have a working C# dll template. My problem: I need to do some one-time initialization, which in a Win32 C dll would be done in DllMain:

BOOL APIENTRY DllMain(HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserved) {
  [one-time stuff here...]
}

Is there a C# equivalent of this? There is no "DllMain" in the C# template I have. I tried a literal C# interpretation, but no go: the dll works but it won't trigger the DllMain function.

public static bool DllMain(int hModule, int reason, IntPtr lpReserved) {
  [one time stuff here...]
}

Answer 1

Give your class a static constructor and do your initialization there. It will run the first time anybody calls a static method or property of your class or constructs an instance of your class.