Timespan intersection in c#

Question

Let\'s say i have 2 date ranges.

Those date ranges could be represented as time spans.

i want to find a date range, that falls within the two time spans. <

Answer 1

Something like this, perhaps?

var range1 = new{start = DateTime.Parse("2/1/2011"), end = DateTime.Parse("8/1/2011")};
var range2 = new{start = DateTime.Parse("5/2/2011"), end = DateTime.Parse("5/28/2011")};
var iStart = range1.start < range2.start ? range2.start : range1.start;
var iEnd = range1.end < range2.end ? range1.end : range2.end;
var newRange = iStart < iEnd ? new{start = iStart, end = iEnd} : null;

This should return null if there is no intersecting time period.

Answer 2

Simple way is to deduct Start time of range 1 with start time of range 2. If time span > 0 then select range 1 start as start date.

Do the same for end date of the range. But if the time span is > 0 then select end date of range 2.

Then compare results if both are valid range. Ie start < end. Otherwise there is no valid range.