C#

byte[] buffer = new byte[3];
Stream mStream = FormManager.bluetoothClient.GetStream();

while (FormManager.bluetoothClient.Connected)
{
   try
      {
        mStream.Read(buffer, 0, buffer.Length);
        System.Diagnostics.Debug.WriteLine("read status "+buffer[0] + " " + buffer[1] + " " + buffer[2] + " -->  Status " + FinalResultBT);
      }
   catch
      {
        System.Diagnostics.Debug.WriteLine("read status fail ");
      }
}

Richard Deeming wrote:

Return an error status code

MyForm mf = new MyForm();
mf.Show();

private void Form1_Load(object sender, EventArgs e)
{
    LogInForm loginfrm = new LogInForm();

// declaring and instantiating the login form here means
// it "disappears" ... goes out of scope ... when this method is finished

    string username, password;

    loginfrm.SendResult = (uname, pword) =>
    {
        username = uname;
        password = pword;
    };

// this injects executable code (as a Delegate) into the new log in form

    DialogResult loginResult = loginfrm.ShowDialog();

    if (loginResult == DialogResult.OK)
    {
        // login success
        // user input now  in variables username, password;

        // now validate, make your connection string, etc.

    }
    else if (loginResult == DialogResult.Cancel)
    {
        // user canceled
    }
    else if (loginResult == DialogResult.Abort)
    {
        // login abort: SendResult not defined in login form
    }
}

using System;
using System.Windows.Forms;

namespace YourNameSpace
{
    public partial class LogInForm : Form
    {
        public LogInForm()
        {
            InitializeComponent();
        }

        public Action<string, string> SendResult;

//  Action<string, string> is equivalent to void Delegate(string, string)

        private void btnLoginAttempt_Click(object sender, EventArgs e)
        {
            if (textBox1.Text != "" && textBox2.Text != "")
            {
                if (SendResult != null) // defensive programming
                {
                    SendResult(textBox1.Text, textBox2.Text); // call the executable code in the main form

                    this.DialogResult = DialogResult.OK;
                }
                else
                {
                    // throw error ? do nothing ? or ...
                    this.DialogResult = DialogResult.Abort;  
                }
            }
            else
            {
                // do nothing ? cancel ? put up error warning ?
            }
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            this.DialogResult = DialogResult.Cancel;
        }
    }
}

private void Form1_Load(object sender, EventArgs e)
{
    LogInForm loginfrm = new LogInForm();

// declaring and instantiating the login form here means
// it "disappears" ... goes out of scope ... when this method is finished

    string username, password;

    loginfrm.SendResult = SendResult;

// this injects executable code (as a Delegate) into the new log in form

    DialogResult loginResult = loginfrm.ShowDialog();

    if (loginResult == DialogResult.OK)
    {
        // login success

        // user input now  in variables username, password;

        // now validate, make your connection string, etc.

    }
    else if (loginResult == DialogResult.Cancel)
    {
        // user canceled
    }
    else if (loginResult == DialogResult.Abort)
    {
        // login abort: SendResult not defined in login form
    }
}

private bool SendResult(string uname, string pword)
{
    // validate and return true of okay

    username = uname;
    password - pword;

    // validate here and return 'true if success
    return false;

}

using System;
using System.Windows.Forms;

namespace YourNameSpaace
{
    public partial class LogInForm : Form
    {
        public LogInForm()
        {
            InitializeComponent();
        }

        // note change here from Action to Func
        public Func<string, string, bool> SendResult;

        private void btnLoginAttempt_Click(object sender, EventArgs e)
        {
            if (textBox1.Text != "" && textBox2.Text != "")
            {
                if (SendResult != null)
                {
                    if (SendResult(textBox1.Text, textBox2.Text))
                    {
                        this.DialogResult = DialogResult.OK;
                    }
                }
                else
                {
                    // throw error, do nothing ? or ...
                    this.DialogResult = DialogResult.Abort;  
                }
            }
            else
            {
                // cancel ? put error warning ?
            }
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            this.DialogResult = DialogResult.Cancel;
        }
    }
}

if (backcolor == "white")
{
    // do this
}
else
{
    // do that
}

if (myLabel.BackColor == Color.White)
    {
    ... do something
    }
else
    {
    ... do something else
    }