Windows Forms

// Each of these event should only fire once when the value is modified,
// where it's with the TextBox or the TrackBar.
private void trackBar1_ValueChanged(Object sender, EventArgs e)
{
    textBox1.Text = trackBar1.Value.ToString();
    DoSomething();    
}

private void textBox1_TextChanged(Object sender, EventArgs e)
{    
    int value = trackBar1.Value;
    if(int.TryParse(textBox1.Text, out value))
    {  
        trackBar1.Value = value;
    }
}

private void DoSomething()
{
    // I want this code to execute once when the value is modified.
}