private void btnChangeImage_Click(object sender, EventArgs e)
    {
        using (var openFileDialogForImgUser = new OpenFileDialog())
        {
            string location = null;
            string fileName = null;
            openFileDialogForImgUser.Filter = "Image Files (*.jpg, *.png, *.gif, *.bmp)|*.jpg; *.png; *.gif; *.bmp|All Files (*.*)|*.*"; // filtering only picture file types
            var openFileResult = openFileDialogForImgUser.ShowDialog(); // show the file open dialog box
            if (openFileResult == DialogResult.OK)
            {
                using (var formSaveImg = new FormSave())
                {
                    var saveResult = formSaveImg.ShowDialog();
                    if (saveResult == DialogResult.Yes)
                    {
                        imgUser.Image = new Bitmap(openFileDialogForImgUser.FileName); //showing the image opened in the picturebox
                        location = openFileDialogForImgUser.FileName;
                        fileName = openFileDialogForImgUser.SafeFileName;

                        FileStream fs = new FileStream(location, FileMode.Open, FileAccess.Read); //Creating a filestream to open the image file
                        int fileLength = (int)fs.Length; // getting the length of the file in bytes
                        byte[] rawdata = new byte[fileLength]; // creating an array to store the image as bytes
                        fs.Read(rawdata, 0, (int)fileLength); // using the filestream and converting the image to bits and storing it in an array

                        MySQLOperations MySQLOperationsObj = new MySQLOperations("localhost", "root", "myPass");
                        MySQLOperationsObj.saveImage(rawdata);
                        fs.Close();
                    }
                    else
                        openFileDialogForImgUser.Dispose();
                }
            }
        }
    }

public void saveImage(byte[] rawdata)
    {
        try
        {
            string myConnectionString = "Data Source = " + server + "; User = " + user + "; Port = 3306; Password = " + password + ";";
            MySqlConnection myConnection = new MySqlConnection(myConnectionString);
            string currentUser = FormLogin.userID;
            string useDataBaseCommand = "USE " + dbName + ";";
            string updateTableCommand = "UPDATE tblUsers SET UserImage = @file WHERE Username = '" + currentUser + "';";
            MySqlCommand myCommand = new MySqlCommand(useDataBaseCommand + updateTableCommand, myConnection);
            myCommand.Parameters.AddWithValue("@file", rawdata);
            myConnection.Open();
            myCommand.ExecuteNonQuery();
            myConnection.Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message, "Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
    }

public MySQLOperations(string server, string user, string password)
    {
        this.server = server;
        this.user = user;
        this.password = password;
    }