Stupid WinForms example showing how to Embed a browser control and handle Yammer OAuth.

gistfile1.cs

// Add these to a form:
// * Web Browser
// * Button 1 (starts the process)
// * Button 2 (outputs the current URL)
// * TextBox 1 (logs actions)
// * TextBox 2 (for the token)

private void button1_Click(object sender, EventArgs e)
{
    webBrowser1.Navigate("https://www.yammer.com/dialog/oauth?client_id=SFZc9HHFXK77keEFYdXphw&redirect_uri=http://brianlyttle.com/yammer/mshtml/redirect_uri&response_type=token");
}

private void button2_Click(object sender, EventArgs e)
{
    MessageBox.Show(webBrowser1.Url.ToString());
}

private void webBrowser1_Navigating(object sender, WebBrowserNavigatingEventArgs e)
{
    textBox1.Text += string.Format("Navigating: {0}{1}", e.Url, Environment.NewLine);
}

private void webBrowser1_Navigated(object sender, WebBrowserNavigatedEventArgs e)
{
    textBox1.Text += string.Format("Navigated: {0}{1}", e.Url, Environment.NewLine);

    if (e.Url.Host == "brianlyttle.com")
    {                
        textBox1.Text += ("Fragment: " + e.Url.Fragment);
        textBox2.Text = e.Url.Fragment.Replace("#access_token=", "");
    }
}