c# - How to map two lists using linq -

If I have a list of such dates:

  list & lt; DateTime & gt; {5-10-2014,6-10-2014,7-10-2014}  

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And I have a list of such sessions:

 < From the code> list & lt; Integer & gt; {1,2,3,4,5,6}  

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How to map sessions based on two sessions (using leaners) in the order of each date.

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I want a result like this:

  5-10-2014 1 5-10-2014 2 6-10-2014 3 6-10-2014 4 7 -10-2014 5 7-10-2014 6  

This is a way that you With it can:

  var grouped date = dates. Select ((date, index) = & gt; new {date = date, index = index}) .GroupJoin (numbers, datewise and index => index, number = & gt; (num - 1) / 2, (date With index, numbers) = & gt; new [] {new} date = date by index.date, number = number.First ()}, new {date = dateWithIndex.Date, number = nums.Last ()}}) .SelectMany (grp = & gt; grp);  

Example:

How it works:

1. Date list in a new order Project that contains the index and date of each date
2. group zone with the list of numbers in that collection. To correlate both of them, use the index , we use the step 1 to date 1, and (num - 1) / 2 , because index is zero-based.
3. To create a reusult, create a new array containing two items, one for each number associated with the date.
4. Finally, to adjust the call SelectMany sequence.