private void button1_Click(object sender, EventArgs e)
{
int a,b,c;
string r;
a= Convert.ToInt32(textBox1.Text);
b= Convert.ToInt32(textBox2.Text);
c=a+b;
r=(string.Format("{0:F2}",c));
textBox3.Text=r;
}
private void button2_Click(object sender, EventArgs e)
{
Close();
}
private void button3_Click(object sender, EventArgs e)
{
textBox1.Text="";
textBox2.Text="";
textBox3.Text="";
}
}
}
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