C# create monochrome bitmap

Bitmap bmp = new Bitmap(300, 300);
           using (Graphics g = Graphics.FromImage(bmp))
           {
               Font font = new Font("Arial", 20, FontStyle.Bold, GraphicsUnit.Point);
               g.Clear(Color.White);
               g.DrawString("Hello", font, Brushes.Black, 0, 0);
           }
           System.Drawing.Imaging.BitmapData bmpData = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), System.Drawing.Imaging.ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format1bppIndexed);
           Bitmap newBitmap = new Bitmap(300, 300, bmpData.Stride, System.Drawing.Imaging.PixelFormat.Format1bppIndexed, bmpData.Scan0);
           newBitmap.Save(@"c:\x\x.bmp");

Source: stackoverrun.com

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