Unload a .NET DLL from an unmanaged process

Question

I\'m extending my Inno-Setup script with code that I can best implement in C# in a managed DLL. I already know how to export methods from a managed DLL as functions for use

Answer 1

The easy way to do what you want is through an AppDomain. You can unload an AppDomain, just not the initial one. So the solution is to create a new AppDomain, load your managed DLL in that and then unload the AppDomain.

        AppDomain ad = AppDomain.CreateDomain("Isolate DLL");
        Assembly a = ad.Load(new AssemblyName("MyManagedDll"));
        object d = a.CreateInstance("MyManagedDll.MyManagedClass");
        Type t = d.GetType();
        double result = (double)t.InvokeMember("Calculate", BindingFlags.InvokeMethod, null, d, new object[] { 1.0, 2.0 });
        AppDomain.Unload(ad);

Here is what the DLL code looks like...

namespace MyManagedDll
{
   public class MyManagedClass
   {
      public double Calculate(double a, double b)
      {
        return a + b;
      }
   }
}