C# Command Line inaccessible due to protection level

Question

I am trying to make a command line based HTTP post to a webpage, where this command line can login and retrieve some data or do other things. I have all the code in place but it does not like non-static things in the static field Main, how do I fix this?

 static void Main(string[] args)
    {
        System.Console.Title = "Test Project";
        bool GoodUsername = false;
        string Username = "";
        while (GoodUsername == false)
        {
            Console.WriteLine("Please enter your username.");
             Username = Console.ReadLine();
            Console.WriteLine("Is " + Username + " correct? Type Yes or No");
            string YesNo = Console.ReadLine();
            if (YesNo == "yes" || YesNo == "Yes" || YesNo == "y")
            {
                GoodUsername = true;
                //return;
            }      
        }
        bool GoodPassword = false;
        string Password = "";           
        while (GoodPassword == false)
        {
            Console.WriteLine("Please enter your password.");
            Password = Console.ReadLine();
            Console.WriteLine("Attempting to log in.");
               string PostURL = "username=" + Username + "&password=" + Password + "&login=Login";
              string URLs = "http://c-rpg.net/index.php?page=login";
             string Response = CRPG.CRPG.DoPost(URLs, PostURL);                       
        }
    }       

Is my Code from one Class.

 string Response = CRPG.CRPG.DoPost(URLs, PostURL);             

Gives me the error.

 CookieContainer cookies = new CookieContainer();
    protected string DoPost(string URLr, string POST)
    {
        Uri url = new Uri(URLr);
        HttpWebRequest HttpWRequest = (HttpWebRequest)WebRequest.Create(url);

        HttpWRequest.Headers.Set("Pragma", "no-cache");
        HttpWRequest.Timeout = 5000;
        HttpWRequest.Method = "POST";
        HttpWRequest.ContentType = "application/x-www-form-urlencoded";
        HttpWRequest.CookieContainer = cookies;

        byte[] PostData = System.Text.Encoding.ASCII.GetBytes(POST);
        HttpWRequest.ContentLength = PostData.Length;
        Stream tempStream = HttpWRequest.GetRequestStream();
        tempStream.Write(PostData, 0, PostData.Length);
        tempStream.Close();

        HttpWebResponse HttpWResponse = (HttpWebResponse)HttpWRequest.GetResponse();
        Stream receiveStream = HttpWResponse.GetResponseStream();
        StreamReader readStream = new StreamReader(receiveStream);

        string rcstr = "";
        Char[] read = new Char[256];
        int count = 0;
        while ((count = readStream.Read(read, 0, 256)) > 0)
        {
            rcstr += new String(read, 0, count);
        }
        HttpWResponse.Close();
        readStream.Close();
        return rcstr;
    }

I can make it public and it gives me the error.

Error   1   An object reference is required for the non-static field, method, or property 'CRPG.CRPG.DoPost(string, string)'    c:\users\sales\documents\visual studio 2010\Projects\Test_CL\Test_CL\Program.cs 40

Answer 1

DoPost() and the cookies field are instance members.
You need an instance of that class to call them on.

You probably want to make them static instead.