C# - TimeSpan For Different Years Substracted From A Bigger TimeSpan?

Feb 9, 2011

The language I am using is C#.

I have the folowing dillema.

DateTime A, DateTime B. If A < B then I have to calculate the number of days per year in that timespan and multiply it by a coeficient that corresponds to that year.
My problem is the fact that it can span multiple years.

For example:

Nr of Days in TimeSpan for 2009 * coef for 2009 + Nr of Days in TimeSpan for 2010 * coef for 2010 + etc

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