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    <p>in <a href="https://stackoverflow.com/questions/1582499/resize-image-gdi-graphics-net/1587486#1587486">this question</a>, you'll have some answers, including mine:</p> <pre><code>public Image resizeImage(int newWidth, int newHeight, string stPhotoPath) { Image imgPhoto = Image.FromFile(stPhotoPath); int sourceWidth = imgPhoto.Width; int sourceHeight = imgPhoto.Height; //Consider vertical pics if (sourceWidth &lt; sourceHeight) { int buff = newWidth; newWidth = newHeight; newHeight = buff; } int sourceX = 0, sourceY = 0, destX = 0, destY = 0; float nPercent = 0, nPercentW = 0, nPercentH = 0; nPercentW = ((float)newWidth / (float)sourceWidth); nPercentH = ((float)newHeight / (float)sourceHeight); if (nPercentH &lt; nPercentW) { nPercent = nPercentH; destX = System.Convert.ToInt16((newWidth - (sourceWidth * nPercent)) / 2); } else { nPercent = nPercentW; destY = System.Convert.ToInt16((newHeight - (sourceHeight * nPercent)) / 2); } int destWidth = (int)(sourceWidth * nPercent); int destHeight = (int)(sourceHeight * nPercent); Bitmap bmPhoto = new Bitmap(newWidth, newHeight, PixelFormat.Format24bppRgb); bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution); Graphics grPhoto = Graphics.FromImage(bmPhoto); grPhoto.Clear(Color.Black); grPhoto.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic; grPhoto.DrawImage(imgPhoto, new Rectangle(destX, destY, destWidth, destHeight), new Rectangle(sourceX, sourceY, sourceWidth, sourceHeight), GraphicsUnit.Pixel); grPhoto.Dispose(); imgPhoto.Dispose(); return bmPhoto; } </code></pre>
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    1. POHow to resize an Image C#
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    1. COYou forgot imgPhoto.Dispose(); the file is kept in use
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