FixedPtr

[StructLayout(LayoutKind.Explicit, Size = 4)]
public struct FixedPtr
{
    [FieldOffset(0)]
    public int Value;

    private FixedPtr(int value)
    {
        Value = value;
    }

    public readonly unsafe T Read<T>() where T : unmanaged
    {
        fixed (byte* pointerToFirst = Program.Memory)
        {
            return *(T*)(pointerToFirst + Value);
        }
    }

    public readonly unsafe void Write<T>(T value) where T : unmanaged
    {
        fixed (byte* pointerToFirst = Program.Memory)
        {
            *(T*)(pointerToFirst + Value) = value;
        }
    }

    public static FixedPtr GetPtrTo(int value)
    {
        return new FixedPtr(value);
    }
}