DataTable Delete empty line empty string

// <summary>
/// DataTableの空列を削除
/// </summary>
/// <param name="dt">DataTable</param>
/// <returns>DataTable</returns>
protected DataTable DataTableRemoveEmptyCol(DataTable dt)
{
    for (int i = dt.Columns.Count - 1; i >= 0; i--)
    {
        bool flg_AllNull = true;
        foreach (DataRow r in dt.Rows)
        {
            if (!r.IsNull(dt.Columns[i]))
            {
                flg_AllNull = false;
                break;
            }
        }
        if (flg_AllNull)
        {
            dt.Columns.RemoveAt(i);
        }
    }
    return dt;
}

 

/// <summary>
/// DataTableの空行を削除
/// </summary>
/// <param name="dt">DataTable</param>
/// <returns>DataTable</returns>
protected DataTable DataTableRemoveEmptyRow(DataTable dt)
{

 

    List<DataRow> removelist = new List<DataRow>();

 

    for (int i = 0; i < dt.Rows.Count; i++)
    {
        bool flg_AllNull = true;
        for (int j = 0; j < dt.Columns.Count; j++)
        {
            if (!string.IsNullOrEmpty(dt.Rows[i][j].ToString()))
            {
                flg_AllNull = false;
                break;
            }
        }
        if (flg_AllNull)
        {
            removelist.Add(dt.Rows[i]);
        }
    }

 

    foreach (var r in removelist)
    {
        dt.Rows.Remove(r);
    }

    return dt;
}