create classes for gdt in csharp

main.cs
public interface IGDT
{
    void Initialize();
    void Shutdown();
    void DrawRectangle(int x, int y, int width, int height, uint color);
    // add other GDT functions here
}
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8 lines

main.cs
public abstract class GDTBase : IGDT
{
    public abstract void Initialize();
    public abstract void Shutdown();
    public abstract void DrawRectangle(int x, int y, int width, int height, uint color);
    // add other GDT functions as abstract methods
}
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8 lines

main.cs
public class MyGDT : GDTBase
{
    public override void Initialize()
    {
        // initialize GDT here
    }

    public override void Shutdown()
    {
        // shutdown GDT here
    }

    public override void DrawRectangle(int x, int y, int width, int height, uint color)
    {
        // draw rectangle using GDT here
    }
}
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main.cs
static void Main(string[] args)
{
    IGDT gdt = new MyGDT(); // create an instance of your GDT class
    gdt.Initialize(); // initialize GDT
    gdt.DrawRectangle(10, 10, 100, 50, 0xFF0000); // draw a rectangle
    gdt.Shutdown(); // shutdown GDT
}
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