Question

Possible Duplicate:
Sort a field of each object in a list with LINQ

I have this collection:

    IEnumerable<sample> sam = new List<sample>()
    {
        new sample{ id = 1, name = "sample 1", list = new List<int>{5,6,1}},
        new sample{ id = 2, name = "sample 1", list = new List<int>{2,9}},
        new sample{ id = 3, name = "sample 1", list = new List<int>{8,3,7}},
        new sample{ id = 4, name = "sample 1", list = new List<int>{8,4,3}},
        new sample{ id = 5, name = "sample 1", list = new List<int>{5,1,7}},
        new sample{ id = 6, name = "sample 1", list = new List<int>{6,9,7}}
    };

How can I sort this using LINQ so that the output is:

     new sample{ id = 2, name = "sample 1", list = new List<int>{2,9}},
     new sample{ id = 5, name = "sample 1", list = new List<int>{5,1,7}},
     new sample{ id = 1, name = "sample 1", list = new List<int>{5,6,1}},
     new sample{ id = 6, name = "sample 1", list = new List<int>{6,9,7}}
     new sample{ id = 3, name = "sample 1", list = new List<int>{8,3,7}},
     new sample{ id = 4, name = "sample 1", list = new List<int>{8,4,3}},

This is sort by ‘list’ by the way.

Thanks

Answer 1

Here’s the LINQ to order sam by the first item of the list property (I gather that’s what you’re after, right?):

IEnumerable<sample> orderedSam = sam.OrderBy(item => item.list.FirstOrDefault());