Here's a way to call APIs without DLLImport. I’ve first saw this years ago at OpenSC.ws as far as I remember and got into the idea. The code was lost since then but I found a copy.

It's a class which can dynamically call a Windows API function at runtime using Reflection.Emit.

Program.cs
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[code]
/*
* User: TMZ
* Date: April 15 2015
* Time: 12:48PM
*
* Released under GPLv2
*/

using System;
using System.Reflection;

namespace APICaller
{
class Program
{