CODEWITHSUNDEEP
c#c++
vkhemnar
vkhemnar

Reputation: 348

when does unmanaged c++ dll unload from memory when called from C# code using pinvoke

I have Sample.dll in C++ like this, 

extern "C" __declspec(dllexport) int func()
{
    return 100;
}

and in from C# i call this

[DllImport("SampleCPP.dll")]
public static extern int func();

I want to know when does Sample.dll will unload from memory when this C# application calls function func(); ?

Upvotes: 0

Views: 281

Answers (1)

cdhowie
cdhowie

Reputation: 169488

The unmanaged DLL will be loaded into the process the first time a function in it is called (either from C# or from some other unmanaged code) and will not be unloaded until the AppDomain that loaded it is destroyed. In a typical program you only have one AppDomain, so it would be unloaded when the process terminates.

Upvotes: 3

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