Template2

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace ChatworkBulkSender.UserControls
{
    // 更新通知用フラグとイベントを定義
    public interface IUpdateble<T>
    {
        event EventHandler<T> DataUpdated;
    }

    public partial class BtnUpdateControl : UserControl
    {
        public event EventHandler BtnUpdateClicked;
        public event EventHandler BtnReturnClicked; 

        public BtnUpdateControl()
        {
            InitializeComponent();
        }

        private void btnReturn_Click(object sender, EventArgs e)
        {
            BtnReturnClicked?.Invoke(this,EventArgs.Empty);
        }

        private void btnUpdate_Click(object sender, EventArgs e)
        {
            BtnUpdateClicked?.Invoke(this,EventArgs.Empty);
        }
    }
}