title: From DataGridView to multiline commaSeparated string
body: <p>I have a DataGridView with four Columns and need to crate a multiline string from its content, separated by comma.<br>
  This code works, but probably - there is a more elegant way:  </p>
  
  <pre><code>string multiLine = "";
  string singleLine;    
  foreach (DataGridViewRow r in dgvSm.Rows)
  {
      if (!r.IsNewRow)
      {
          singleLine = r.Cells[0].Value.ToString() + ","
          + r.Cells[1].Value.ToString() + ","
          + r.Cells[2].Value.ToString() + ","
          + r.Cells[3].Value.ToString() + Environment.NewLine;
          multiLine = multiLine + singleLine;
      }
  }
  </code></pre>