public static VersionForm GetInstance() { if (_singInstance == null) { _singInstance = new VersionForm(); } return(_singInstance); //自分自身のオブジェクトを探す }
private void VersionToolStripMenuItem_Click(object sender, EventArgs e) { //VersionForm versionForm = new VersionForm(); VersionForm.GetInstance().Show(); //versionForm.Show(); //モーダルダイアログとして表示 }
private void VersionForm_FormClosed(object sender, FormClosedEventArgs e) { _singInstance = null; }