Use StreamReader to stream data to a datagrid.

StreamReaderToDataGrid.cs

using (StreamReader reader = new StreamReader(filePathLoadedData, true))
{
	string line;
	int counter = 1;
	while ((line = reader.ReadLine()) != null)
	{
		try
		{
			string domain = "";string user = "";string pass = "";
			string[] readed;line = line.Remove(0, 6);string[] tmp_extracted_domain = line.Split(':'); 
			string tmp_lineNew = tmp_extracted_domain[1];string[] tmp_getServer = tmp_lineNew.Split('@');
			user = tmp_extracted_domain[0];pass = tmp_getServer[0];domain = tmp_getServer[1];
			dg_loadedFtp.Rows.Add(counter,domain,user, pass, "", "");
			counter++;
			
		}
		catch (Exception ex) { }
	} reader.Close();
}