Guys this is a visual C# code but can anyone tell me what's wrong with it?

Question

using System;
using System.Windows.Forms;

namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{
bool A = radioButton1.Checked;
bool B = radioButton2.Checked;
bool C = radioButton3.Checked;
String X = label1.Text;
if (A == true)
X = "330

Answer 1

remove the (C==true) after the last else ,or change it to else if (C==true)

Answer 2

I am not sure the C# compiler used by this app recognises GUI elements.