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Editorial Team
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Asked: 2026-06-17T18:44:24+00:00

I have a statement… if (lastInvoice.Invoice_Date < DateTime.Now.AddMonths(-12)) This checks the date on the

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I have a statement…

if (lastInvoice.Invoice_Date < DateTime.Now.AddMonths(-12))

This checks the date on the Invoice, if it is less than 12 months ago I.E anything before Jan 2012, proceed with the code.

So instead of dateTime.Now.AddMonths(-12)) I want to say 6 months from the date on the invoice

I’ve tried…

if (lastInvoice.Invoice_Date < lastInvoice.Invoice_Date.AddMonths(-0-worksite.Number_of_Months))

Also tried without the (-0) and just had it as (0) but need the – for the expression.
Anyway it’s not returning what it should be. What am I doing wrong?

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1 Answer

  1. Editorial Team

    lastInvoice.Invoice_Date will never be less than lastInvoice.Invoice_Date.AddMonths(-anything).

    This should work for you:

    if (lastInvoice.Invoice_Date < DateTime.Now.AddMonths(-worksite.Number_of_Months))

    If that isn’t giving you the correct answer, I’d use the debugger to confirm that worksite.Number_of_Months is actually what you expect it to be.

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