static void Main(string[] args)
{
string consumer_key = "IGWZ6nY3v3cHBh0yfj6RJw";
string consumer_secret = "zfwTlwwjGSAKChGwJi5DpJSBsIlZ7HE3ZCMUfelCk";
Class1 cls = new Class1();
Console.WriteLine(cls.GetAccessToken(consumer_key , consumer_secret));
}