No overload matches delegate.. Why?
<p>I have this code:</p>

<pre><code>Button ssr = new Button();
                ssr.Text = "SSR";
                ssr.Location = new Point(500, 5);
                ssr.Size = new Size(50, 30);
                ssr.Click += new EventHandler(ssr_Click);
</code></pre>

<p>And I had a method ssr_Click which wrote a "1234" on the button. That was just for testing, now the method looks like this:</p>

<pre><code>private void ssr_Click(string callsign, object sender, EventArgs e)
    {
        using (var wb = new WebClient())
        {
            string url = "xxxxxxxx";
            WebRequest request = WebRequest.Create(url);
            request.Method = "POST";
            string postData = "callsign=" + callsign;
            byte[] byteArray = Encoding.UTF8.GetBytes(postData);
            request.ContentType = "application/x-www-form-urlencoded";
            request.ContentLength = byteArray.Length;
            Stream dataStream = request.GetRequestStream();
            dataStream.Write(byteArray, 0, byteArray.Length);
            dataStream.Close();
            WebResponse response = request.GetResponse();
            Console.WriteLine(((HttpWebResponse)response).StatusDescription);
            dataStream = response.GetResponseStream();
            StreamReader reader = new StreamReader(dataStream);
            string squawk = reader.ReadToEnd();
            System.Windows.Forms.MessageBox.Show(squawk); // !!!
            reader.Close();
            dataStream.Close();
            response.Close();
        }
    }
</code></pre>

<p>It is okay, it just doesn't know the "callsign", which makes sense, because it is defined somwhere else, so I added "string callsign" to the method parameters that when I call it, I also will give it the callsign. Since I did this, I get an error in first part of code, at line </p>

<pre><code>ssr.Click += new EventHandler(ssr_Click);
</code></pre>

<p>it says this: No overload for 'ssr_Click' matches delegate 'System.EventHandler'. It was fine before editing this method.
It is supposed to do this: someone clicks the button, it sends the callsign to the method, gets a four digit code from a .php at website, and it writes the code on the button, so I know that I will also have to edit the method so it returns a string, but first I need to solve this..
Any ideas?  </p>
