if(RadioBtn1.Checked = true)
{
panel1.visible = true;
}
else if (RadioBtn2.Checked = true)
{
panel2.visible = true;
}
else if (RadioBtn3.Checked = true)
{
panel3.visible = true;
}
else if (RadioBtn4.Checked = true)
{
panel4.visible = true;
}
else
{
panel1.visible = false;
panel2.visible = false;
panel3.visible = false;
panel4.visible = false;
}