How to set a default value to a textbox

hello @Abhay you should use these two method

 

  private void Form1_Load(object sender, EventArgs e)
{

textBox1.Text = "12345";

}

 

private void textBox1_Leave(object sender, EventArgs e)
{ if(textBox1.Text.Length==0)
textBox1.Text = "12345";
} 

 

 i hope it help you

 

Hi,

 

 

private void textBox1_Validated(object sender, EventArgs e)
{
  if (((TextBox)sender).Text == "")
  {
   ((TextBox)sender).Text = "1";
  }
}