C#字体字号的改变

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void radioButton6_CheckedChanged(object sender, EventArgs e)
{
label1.Font = new Font(label1.Font.FontFamily, label1.Font.Size, label1.Font.Style ^ FontStyle.Bold);
}

private void radioButton4_CheckedChanged(object sender, EventArgs e)
{
label1.Font = new Font(label1.Font.FontFamily, label1.Font.Size, label1.Font.Style ^ FontStyle.Italic);
}

private void radioButton5_CheckedChanged(object sender, EventArgs e)
{
label1.Font = new Font(label1.Font.FontFamily, label1.Font.Size, label1.Font.Style ^ FontStyle.Underline );
}

private void radioButton7_CheckedChanged(object sender, EventArgs e)
{
label1.Font = new Font(label1.Font.FontFamily, label1.Font.Size, label1.Font.Style ^ FontStyle.Strikeout );
}

private void radioButton9_CheckedChanged(object sender, EventArgs e)
{
label1.Font = new Font(label1.Font.FontFamily, 12,label1.Font .Style );
}

private void radioButton8_CheckedChanged(object sender, EventArgs e)
{
label1.Font = new Font(label1.Font.FontFamily, 18, label1.Font.Style);
}

private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
label1.Font = new Font("宋体", label1.Font.Size, label1.Font.Style);
}

private void radioButton2_CheckedChanged(object sender, EventArgs e)
{
label1.Font = new Font("隶书", label1.Font.Size, label1.Font.Style);
}

private void radioButton3_CheckedChanged(object sender, EventArgs e)
{
label1.Font = new Font("黑体", label1.Font.Size, label1.Font.Style);
}
}
}