OpenTween.TweenMain.TabRename C# (CSharp) Method

        public bool TabRename(string origTabName, out string newTabName)
        {
            //タブ名変更
            newTabName = null;
            using (InputTabName inputName = new InputTabName())
            {
                inputName.TabName = origTabName;
                inputName.ShowDialog();
                if (inputName.DialogResult == DialogResult.Cancel) return false;
                newTabName = inputName.TabName;
            }
            this.TopMost = this._cfgCommon.AlwaysTop;
            if (!string.IsNullOrEmpty(newTabName))
            {
                //新タブ名存在チェック
                for (int i = 0; i < ListTab.TabCount; i++)
                {
                    if (ListTab.TabPages[i].Text == newTabName)
                    {
                        string tmp = string.Format(Properties.Resources.Tabs_DoubleClickText1, newTabName);
                        MessageBox.Show(tmp, Properties.Resources.Tabs_DoubleClickText2, MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                        return false;
                    }
                }

                var tabPage = this.ListTab.TabPages.Cast<TabPage>()
                    .FirstOrDefault(x => x.Text == origTabName);

                // タブ名を変更
                if (tabPage != null)
                    tabPage.Text = newTabName;

                _statuses.RenameTab(origTabName, newTabName);

                SaveConfigsCommon();
                SaveConfigsTabs();
                _rclickTabName = newTabName;
                return true;
            }
            else
            {
                return false;
            }
        }