System.Data.DataTable.ConvertToRowState C# (CSharp) Method

        private DataRowState ConvertToRowState(BitArray bitStates, int bitIndex)
        {
            Debug.Assert(bitStates != null);
            Debug.Assert(bitStates.Length > bitIndex);

            bool b1 = bitStates[bitIndex];
            bool b2 = bitStates[bitIndex + 1];

            if (!b1 && !b2)
            {
                return DataRowState.Unchanged;
            }
            else if (!b1 && b2)
            {
                return DataRowState.Added;
            }
            else if (b1 && !b2)
            {
                return DataRowState.Modified;
            }
            else if (b1 && b2)
            {
                return DataRowState.Deleted;
            }
            else
            {
                throw ExceptionBuilder.InvalidRowBitPattern();
            }
        }