Opc.Ua.ContentFilter.GetOperands C# (CSharp) Method

        private FilterOperand[] GetOperands(ContentFilterElement element, int expectedCount)
        {
            FilterOperand[] operands = new FilterOperand[element.FilterOperands.Count]; 

            int ii = 0;

            foreach (ExtensionObject extension in element.FilterOperands)
            {
                if (ExtensionObject.IsNull(extension))
                {
                    throw new ServiceResultException(StatusCodes.BadUnexpectedError, "FilterOperand is null.");
                }

                FilterOperand operand = extension.Body as FilterOperand;

                if (operand == null)
                {
                    throw new ServiceResultException(StatusCodes.BadUnexpectedError, "FilterOperand is not supported.");
                }
               
                operands[ii++] = operand;
            }

            if (expectedCount > 0 && expectedCount != operands.Length)
            {
                throw new ServiceResultException(StatusCodes.BadUnexpectedError, "ContentFilterElement does not have the correct number of operands.");
            }

            return operands;
        }