How do I compute the sum of several "Money" type properties (some may contain NULL values) in a computed property of an entity in LIghswitch using C#

Question

I am developing a Lightswitch Application and in one of the Entities I have several currency type properties and I would like to add them all up in one calculated property using C#. For instance:
I have 3 columns Amount1                 Amount2                 Amount3 And would like the total
sum of the 3 fields.
With result = Amount1 + Amount2 + Amount3
The will add all the column as long as there is data but if Amount2 is NULL then no result is written to the computed property.

Answer 1

Here is the actual code.
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
using
Microsoft.LightSwitch;
namespace
LightSwitchApplication
publicpartialclassTransaction
partialvoidTotalDue_Compute(refdecimal?
result)
// Set result to the desired field value
            result = StandardServiceFee + TransferFee + EstoppleFee + StateSurcharge + AttorneySurcharge + CountyRecordingSurcharge + OutOfCountryFee + ROFR + RCITransferFee
+ OtherFee + MF2015 + MF2016;
partialvoidMF2016_Validate(EntityValidationResultsBuilderresults)
// results.AddPropertyError("<Error-Message>");
            result = (MF2016.HasValue ? (
decimal)MF2016 : 0);