image is not accessible in picture box

private void BtnAddEmployee_Click(object sender, EventArgs e)
        {
            
            Image myImage = Image.FromFile(imgLoc);
            byte[] data;
            using (MemoryStream ms = new MemoryStream())
            {
                myImage.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
                data = ms.ToArray();
            }


            using (SqlConnection con1 = new SqlConnection("data source=.;Initial catalog=RMSDB;user=sa;password=ibs;"))
            {
                con1.Open();
                using (SqlCommand com1 = new SqlCommand("INSERT INTO Employees(Emp_Pic_ImageData) VALUES (@IM)", con1))
                {
                    com1.Parameters.AddWithValue("@IM", data);
                    com1.ExecuteNonQuery();
                }
            }
}

string imgLoc = "";
        private void BtnBrowseimage_Click(object sender, EventArgs e)
        {
            
            OpenFileDialog dlg = new OpenFileDialog();
            dlg.Filter = "jpg All files (*.jpg)| *.jpg" + " | All Files (*.*) | *.*";
            if (dlg.ShowDialog()==DialogResult.OK)
            {
                imgLoc = dlg.FileName.ToString();
                PicboxEmployee.ImageLocation = imgLoc;
            }
            
        }

string sql = String.Format("Select Emp_Pic_ImageData From Employees where Emp_Id='{0}'", TxtBoxId.Text);
            SqlCommand cmd = new SqlCommand(sql, con);
            SqlDataReader reader = cmd.ExecuteReader();
            reader.Read();
            if (reader.HasRows)
            {
                byte[] img = (byte[])(reader[0]);
                if (img == null)
                {
                    PicboxEmployee.Image = null;
                }
                else
                {
                    MemoryStream mstrm = new MemoryStream(img);
                    PicboxEmployee.Image = new System.Drawing.Bitmap(mstrm); //there is error of parameter is not valid.

                }
            }
            else
            {

                MessageBox.Show("this not exists");

            }