inserting textbox values into the gridview

DataTable dt = new DataTable();
dt.Columns.Add("Name", typeof(string));
dt.Columns.Add("Department", typeof(string));
dt.Columns.Add("Age", typeof(string));
dt.Columns.Add("Salary", typeof(string));
dt.AcceptChanges();

string[] arrs=txtDemo.Text.Split(new string[]{"\n","\r"},StringSplitOptions.RemoveEmptyEntries); //txtDemo: Multiline TextBox ID
foreach (string arr in arrs)
{
    string[] arrCol = arr.Split(' ');
    DataRow dr = dt.NewRow();
    dr["Name"] = arrCol[0];
    dr["Department"] = arrCol[1];
    dr["Age"] = arrCol[2];
    dr["Salary"] = arrCol[3];
    dt.Rows.Add(dr);
}
dt.AcceptChanges();
gv.DataSource = dt; //gv: GridView ID
gv.DataBind();