Color Detecting in an Image in C#

private void PickColorBtn_Click(object sender, EventArgs e)
{
    try
    {
        // Clean previously selected color
        SelectedColorNameLbl.Text = "";
        panelSelectedColor.BackColor = actualColor;
 
        //Showing color choice
        DialogResult IsColorChosen = colorDialog1.ShowDialog();
 
        if (IsColorChosen == System.Windows.Forms.DialogResult.OK)
        {
            panelSelectedColor.BackColor = colorDialog1.Color;
 
            //If it is know color, display the color name  
            if (colorDialog1.Color.IsKnownColor == true)
            {
                SelectedColorNameLbl.Text = colorDialog1.Color.ToKnownColor().ToString();
            }
        }
    }
    catch (Exception exc)
    {
        MessageBox.Show(exc.Message);
    }
}

Color Detection: For color detection, first we convert the loaded image into a picture box of a "BitMap" class. Refer to the following MSDN link for more details:

http://msdn.microsoft.com/en-us/library/system.drawing.bitmap.aspx

Then we iterate to each pixel of the image and get the pixel color. We store each pixel color into a temporary variable named "now_color". Get the 32-bit ARGB value of this "now_color" (a Color Object) with 32-bit ARGB value of our "Picked Color". If both values are the same, we display a "Color Found!" message and break from the iteration, otherwise we keep looking from the next pixel until we have covered the entire image. If we don't get the color we are looking for then we show a "Selected Color Not Found" Message. For the color detection, refer to the following code:

private void DetectColorBtn_Click(object sender, EventArgs e)
{
    try
    {
        Boolean IsColorFound = false;
            if (pictureBox1.Image != null)
        {
             //Converting loaded image into bitmap
             Bitmap bmp = new Bitmap(pictureBox1.Image);
 
             //Iterate whole bitmap to findout the picked color
             for (int i = 0; i < pictureBox1.Image.Height; i++)
             {
                  for (int j = 0; j < pictureBox1.Image.Width; j++)
                  {
                       //Get the color at each pixel
                       Color now_color = bmp.GetPixel(j, i);
 
                       //Compare Pixel's Color ARGB property with the picked color's ARGB property 
                       if (now_color.ToArgb() == colorDialog1.Color.ToArgb())
                       {
                            IsColorFound = true;
                            MessageBox.Show("Color Found!");
                            break;
                       }
                  }
             if (IsColorFound == true)
             {
                  break;
             }
        }
        if (IsColorFound == false)
        {
              MessageBox.Show("Selected Color Not Found.");
        }
   }
   else
   {
         MessageBox.Show("Image is not loaded");
   }
   }
   catch (Exception exc)
   {
        MessageBox.Show(exc.Message);
    }
}

Thanks