//粘贴        private void tsbPaste_Click(object sender, EventArgs e)        {            IDataObject iData = Clipboard.GetDataObject();            if (iData.GetDataPresent(DataFormats.Text))            {                txtContent.Text = (String)iData.GetData(DataFormats.Text);            }        }        //复制        private void tsbCopy_Click(object sender, EventArgs e)        {            if (txtContent.Text != "")            {                Clipboard.SetDataObject(txtContent.Text);                MessageBox.Show("已复制到剪贴板！");            }        }