I need to calculate the location of intersections between multiple date ranges, and the number of overlapping intersections. Then I need to show which date/time ranges overlap each of those intersecting sections. It is slightly more complicated than that so I'll do my best to explain by providing an example. I am working in VB.Net, but C# examples are acceptable as well as I work in both.

We have several high risk tasks that involve the same system. Below I have three example jobs named HR1/2/3/4 with start and end date/times.

• HR1 {1/6/2010 10:00 - 1/6/2010 15:00}
• HR2 {1/6/2010 11:00 - 1/6/2010 18:00}
• HR3 {1/6/2010 12:00 - 1/6/2010 14:00}
• HR4 {1/6/2010 18:00 - 1/6/2010 20:00}

What I want the end result to be is shown below. I am having trouble describing it any way but by example.

• HRE1 {1/6/2010 10:00 - 1/6/2010 11:00} - Intersects 1
• {End Time Split 1, for readability only, not needed in solution}
• HRE1 {1/6/2010 11:00 - 1/6/2010 12:00} - Intersects 2
• HRE2 {1/6/2010 11:00 - 1/6/2010 12:00} - Intersects 2
• {End Time Split 2, for readability only, not needed in solution}
• HRE1 {1/6/2010 12:00 - 1/6/2010 14:00} - Intersects 3
• HRE2 {1/6/2010 12:00 - 1/6/2010 14:00} - Intersects 3
• HRE3 {1/6/2010 12:00 - 1/6/2010 14:00} - Intersects 3
• {End Time Split 3, for readability only, not needed in solution}
• HRE1 {1/6/2010 14:00 - 1/6/2010 15:00} - Intersects 2
• HRE2 {1/6/2010 14:00 - 1/6/2010 15:00} - Intersects 2
• {End Time Split 4, for readability only, not needed in solution}
• HRE2 {1/6/2010 15:00 - 1/6/2010 18:00} - Intersects 1
• {End Time Split 5, for readability only, not needed in solution}
• HR4 {1/6/2010 18:00 - 1/6/2010 20:00} - Intersects 1

Any help would be greatly appreciated.