Grouping in linq

Question

I have a following list of documents:

List<DocumentInfo> list1 = new List<DocumentInfo>()
{
   new DocumentInfo { Name = "Customer1", DocCount = 5 },
   new DocumentInfo { Name = "Customer1", DocCount = 10 },
   new DocumentInfo { Name = "Customer1", DocCount = 5 },
   new DocumentInfo { Name = "Customer2", DocCount = 4 },
   new DocumentInfo { Name = "Customer2", DocCount = 6 },
   new DocumentInfo { Name = "Customer3", DocCount = 3 }
};

How to group the above list based on 'Name' and sum of 'DocCount' using Linq and store in another list? I want something like following:

Name = "Customer1", DocCount = 20
Name = "Customer2", DocCount = 10
Name = "Customer3", DocCount = 3

Answer 1

var results = list1.GroupBy(i => i.Name)
                   .Select(g => new
                                {
                                    Name = g.Key,
                                    DocCount = g.Sum(i => i.DocCount)
                                });