image retrieve from database

SqlCommand cmd = new SqlCommand("ReadImage", con);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("@imgId", SqlDbType.Int).Value = Convert.ToInt32(cmbImageID.SelectedValue.ToString());
SqlDataAdapter adp = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();

try
{
    if (con.State == ConnectionState.Closed)
        con.Open();
    adp.Fill(dt);
    if (dt.Rows.Count > 0)
    {
        MemoryStream ms = new MemoryStream((byte[])dt.Rows[0]["ImageData"]);
        picImage.Image = Image.FromStream(ms);

        picImage.SizeMode = PictureBoxSizeMode.StretchImage;
        picImage.Refresh();
    }
}
Table name = ImageData Column name= ImageData

CREATE PROCEDURE dbo.ReadImage 
	(@imgId int)
AS
	SELECT ImageData FROM ImageData
	WHERE ImageID=@imgId
	RETURN