Create Thumbnail for image using c#

// Setting Thumbnail size
int height = 600;
int width = 400;

// Getting desired image
Bitmap objImage = new Bitmap("--file path --");

// Showing image in picturebox, here pictureBox1 is pictureBox control 
pictureBox1.Image = objImage.GetThumbnailImage(width, height,null, IntPtr.Zero);