// The \r\n escape codes correspond to carriage return and line feed.
txtResult.Text = "Line1\r\nLine 2"

// The NewLine is good for portability between winforms and webforms.
txtResult.Text = "Line1"+System.Environment.NewLine+"Line 2"

// The @ escape character let's you write it exactly as it would display, similar to VFP's text/endtext.
TxtResult.Text = 
@"Line 1
Line2
";

from solutions provided by Einar Kvandahl and Çetin Basöz in Message #1030414 and Message #1030422

protected virtual void ForceChangedRows(DataSet ds)
{
   if (ds == null)
      return;

   for (int nTable = 0; nTable < ds.Tables.Count; nTable++)
   {
      for (int nRow = 0; nRow < ds.Tables[nTable].Rows.Count; nRow++)
      {
         if (ds.Tables[nTable].Rows[nRow].HasVersion(DataRowVersion.Proposed))
         {
            ds.Tables[nTable].Rows[nRow].EndEdit();
         }
      }
   }
}

from a solution provided by Bonnie Berent in Message #1047186

from solutions provided by Paul Mrozowski and Rick Strahl in Message #1021097 and Message #1021100

private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
  e.Cancel = (MessageBox.Show("Some question", "Message",
    MessageBoxButtons.OKCancel,  MessageBoxIcon.Question )).ToString()
    != "OK";
}

from a solution provided by Hilmar Zonneveld in Message #1043118