C# Window form textbox string

See more:

C#

Windows

string

text

form

I have this code to write the string number1 into the textbox and a button (button2) to add "1" to the string number1 so it would appear in the textbox, but the textbox only shows the text inside it once i've pressed a button on it like a letter or Enter, any idea how to make it always show the string ?

ask questions if im not clear enough

private void textBox1_TextChanged(object sender, EventArgs e)
{
        textBox1.Text = number1.ToString();
}
private void button2_Click(object sender, EventArgs e)
{
    if(num1)
    {
        number1 = number1 + "1";
    }
    if (!num1)
    {
        number2 = number2 + "1";
    }
}