restrict file / image size in c#
private bool ValidFile(string filename, long limitInBytes, int limitWidth, int limitHeight) { var fileSizeInBytes = new FileInfo(filename).Length; if(fileSizeInBytes > limitInBytes) return false; using(var img = new Bitmap(filename)) { if(img.Width > limitWidth || img.Height > limitHeight) return false; } return true; } private void selectImgButton_Click(object sender, EventArgs e) { if (openFileDialog1.ShowDialog() == DialogResult.OK) { if(ValidFile(openFileDialog1.FileName, 102400, 350, 350)) { // Image is valid and U can // Do something with image // For example set it to a picture box pictureBox1.Image = new Bitmap(openFileDialog1.FileName); } else { MessageBox.Show("Image is invalid"); } } }