[Release] Dif Creator [OpenSource]

using System;
using System.IO;
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 WindowsFormsApplication5
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void clear_button_Click(object sender, EventArgs e)
        {
            byte_box.Text = "";
            data_name.Text = "";
        }

        private void create_button_Click(object sender, EventArgs e)
        {
            string name = data_name.Text;
            string text = byte_box.Text;

            if (text == "")
            {
                text = "-leer-";
            }

            if (name == "")
            {
                name = "Unbenannt";
            }

            StreamWriter file = new StreamWriter(name + ".dif", true);
            file.Write(text);
            file.Close();
        }
    }
}

using System;
using System.IO;
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 WindowsFormsApplication5
{
    public partial class Form1 : Form
    {

        public static string ext;
        
        public Form1()
        {
            InitializeComponent();
        }

        private void clear_button_Click(object sender, EventArgs e)
        {
            byte_box.Text = "";
            data_name.Text = "";
        }

        private void create_button_Click(object sender, EventArgs e)
        {
            string name = data_name.Text;
            string text = byte_box.Text;

            if (text == "")
            {
                text = "-leer-";
            }

            if (name == "")
            {
                name = "Unbenannt";
            }

            StreamWriter file = new StreamWriter(name + ext, true);
            file.Write(text);
            file.Close();
        }

        private void dif_radio_CheckedChanged(object sender, EventArgs e)
        {
            ext = ".dif";
        }

        private void quest_radio_CheckedChanged(object sender, EventArgs e)
        {
            ext = ".quest";
        }

        private void lua_radio_CheckedChanged(object sender, EventArgs e)
        {
            ext = ".lua";
        }

        private void py_radio_CheckedChanged(object sender, EventArgs e)
        {
            ext = ".py";
        }

        private void own_radio_CheckedChanged(object sender, EventArgs e)
        {
            ext = own_radio_ext.Text;
        }

        private void Form1_Load(object sender, EventArgs e){}
        private void own_radio_ext_TextChanged(object sender, EventArgs e){}
    }
}