C# load DLL manually with loadlibrary before the CLR does

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Hello, i'm pretty new at C# (using VB.Net before), i wanted to use method from Benoit Blanchon from this post:
.net - Using a 32bit or 64bit dll in C# DllImport - Stack Overflow[^]

But i'm not sure about

Quote:
can be done in the static constructor of the parent class.

Just guessing, is it supposed to add the code around the Program.cs? as i know that's where the app starts. if so, where should I put the code? because it seems the code is not detected when I put it above/below [STAThread], even the app unable to start if I modify the Program.cs a lot :).

my default Progarm.cs

C#

namespace TestApp
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
?... 
Debug.WriteLine("Wanted to make sure if the DLL Loaded");
?... 
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
}

Thanks in advance.

What I have tried:

Tried to place the code in Form1.cs, also googling about static constructor / parent class too, but still not figured it.

Posted 28-Oct-21 11:51am

DevJr

Updated 28-Oct-21 12:39pm

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PIEBALDconsult 28-Oct-21 18:40pm

As it says, in a static constructor of the Program class.

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Dave Kreskowiak · Answer 1 · 2021-10-28T12:39:00

I think you're looking for, though this may not work at all. You may have to move the code to a class separate from Program: (I don't have time to test this)

C#

namespace TestApp
{
    static class Program
    {

        ... Your DllImport line(s) for the test
        ... function you want to call goes here

        static Program()
        {
            ... Your architecture determination 
            ... and dll loading code goes here
        }

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            ... Your "test" call to the functions in the DLL goes here

            Debug.WriteLine("Wanted to make sure if the DLL Loaded");

            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
}