Add project files.

App.config

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+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
+    </startup>
+</configuration>

Form1.cs

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+using System;
+using System.IO;
+using System.Diagnostics;
+using System.Windows.Forms;
+
+namespace Youtube_Downloader
+{
+    public partial class Form1 : Form
+    {
+        public Form1()
+        {
+            InitializeComponent();
+        }
+        private void button2_Click(object sender, EventArgs e)
+        {
+            this.Close();
+        }
+
+        public void YTDL ()
+        {
+            string all = "youtube-dl.exe" + textBox1.Text + maskedTextBox1.Text + " -o " + maskedTextBox2.Text + "%(title)s.%(ext)s" + textBox1.Text;
+            var proc1 = new ProcessStartInfo();
+            proc1.UseShellExecute = true;
+            proc1.WorkingDirectory = @"C:\YT-DL\";
+            proc1.FileName = @"C:\Windows\System32\cmd.exe";
+            /// as admin = proc1.Verb = "runas";
+            proc1.Arguments = "/c " + all;
+            proc1.WindowStyle = ProcessWindowStyle.Minimized;
+            Process.Start(proc1);
+        }
+
+        private void button1_Click(object sender, EventArgs e)
+        {
+            YTDL();
+        }
+
+        private void button3_Click(object sender, EventArgs e)
+        {
+            Form2 f2 = new Form2();
+            f2.ShowDialog();
+        }
+    }
+}