Union, intersection and difference analysis of List in C#

The union of sets is to merge the items of the sets, as shown below:

List<int> ls1 = new List<int>() { 1,2,3,5,7,9 };
List<int> ls2 = new List<int>() { 2,4,6,8,9,10};

IEnumerable<int> unionLs = ls1.Union(ls2);foreach (int item in unionLs)
{
    Console.Write("{0}\t", item);
}

##The intersection of sets is to take the common items of the sets, as shown in the following figure:

List<int> ls1 = new List<int>() { 1,2,3,5,7,9 };
List<int> ls2 = new List<int>() { 2,4,6,8,9,10};


IEnumerable<int> intersectLs = ls1.Intersect(ls2);foreach (int item in intersectLs)
{
    Console.Write("{0}\t",item);
}

The difference set of a set is to take all the items that are in this set but not in another set, as shown in the following figure:

List<int> ls1 = new List<int>() { 1,2,3,5,7,9 };
List<int> ls2 = new List<int>() { 2,4,6,8,9,10};


IEnumerable<int> exceptLs = ls1.Except(ls2);foreach (int item in exceptLs)
{
    Console.Write("{0}\t", item);
}

##

The above is the detailed content of Union, intersection and difference analysis of List in C#. For more information, please follow other related articles on the PHP Chinese website!