Add project files.

Form1.Designer.cs

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+namespace Traffic_Light
+{
+    partial class Form1
+    {
+        /// <summary>
+        ///  Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        ///  Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        ///  Required method for Designer support - do not modify
+        ///  the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            btn_switch = new Button();
+            SuspendLayout();
+            // 
+            // btn_switch
+            // 
+            btn_switch.Location = new Point(347, 225);
+            btn_switch.Name = "btn_switch";
+            btn_switch.Size = new Size(112, 34);
+            btn_switch.TabIndex = 0;
+            btn_switch.Text = "Switch";
+            btn_switch.UseVisualStyleBackColor = true;
+            btn_switch.Click += btn_switch_Click;
+            // 
+            // Form1
+            // 
+            AutoScaleDimensions = new SizeF(10F, 25F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(800, 450);
+            Controls.Add(btn_switch);
+            Name = "Form1";
+            Text = "Form1";
+            ResumeLayout(false);
+        }
+
+        #endregion
+
+        private Button btn_switch;
+    }
+}