using System;using System.Drawing;using System.Windows.Forms; using System.IO;using System.Drawing.Imaging;using System.Drawing.Drawing2D; namespace howto_rotate_image_interactively{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } // The original image. private Bitmap OriginalBitmap; // The rotated image. private Bitmap RotatedBitmap; // The center of the bitmap. pr..