Quick Question - Newbie

Question

Ok assume the following: public Form1() { InitializeComponent(); string b = "Hello"; } public void button1_Click(object sender, System.EventArgs e) { label1.Text = b; } If they're both in the namespace how come I can't refer to b in the button click event handling code? I know I can declare the string b in that specific part locally but the whole idea is to figure out why my button handling code can't use anything outside of it. Help please. Thanks.