c# - validating textbox in windows form applications

Question

My scenario is:

Not allowing spaces at starting position of textbox after enter one or more characters text box allows spaces

Below not applicable to my scenario.

1. private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
   {
       if (e.Handled = (e.KeyChar == (char)Keys.Space))
       {
           MessageBox.Show("Spaces are not allowed");
       }
   }
   

2. textBox1.Text.TrimStart()
   

Answer 1

private void textBox1_KeyPress(object sender, KeyPressEventArgs e) 
{ 
if(textBox1.Text.Length == 0)
    {
    if (e.Handled = (e.KeyChar == (char)Keys.Space)) 
        { 
        MessageBox.Show("Spaces are not allowed at start"); 
        } 
    }
}