linq join two lists

Join is self defined at the joining of two or more data together; Here I am instructed join of list object in C#;

@linq join two lists

var result = from Item1 in listItem1

             join Item2 in listItem2

             on Item1.Id equals Item2.Id // Join values

             select new { Item1, Item2 };

@get the result in form of concrete list,  needed to call .ToList()

Get the result in the form of list

  var list3 = (from Item1 in list1

             join Item2 in list2

             on Item1.Id equals Item2.Id // join on some property

             select new { Item1, Item2 }).ToList()

@Linq Union operator in C#

Linq Union operator will give the combined unique result of to list contains,

static void Main(string[] args)

        {

            List<string> name1 = new List< string >() { "a", "b", "c"};

            List< string > name2 = new List< string >() {"c", "d" };

            List<string> uniqueName = name1.Union(name2).ToList();

            foreach(string st in uniqueName)

            {

                Console.WriteLine(st);

            }

        }

It will give the result as

a

b

c

d