Get List Items by Field Value

public List<SPListItem>  GetItemsContainingValue(SPList list, Guid fieldId, string match)
{
    List<SPListItem> matchingItems =
        (from SPListItem listItem in list.Items
         where
             listItem.Fields.Contains(fieldId) &&
             listItem[fieldId] != null &&
             listItem[fieldId].ToString().Equals(match, StringComparison.InvariantCultureIgnoreCase)
         select listItem).ToList<SPListItem>();
 
    return matchingItems;
}