C# merge two lists with return

Combine two lists c#

List<string> a = new List<string>();
List<string> b = new List<string>();

a.AddRange(b);

Source: stackoverflow.com

C# merge two lists

// Create your object
public class A { int Id { get; set; } A() { } A(int id) { Id = id;} }
public class B { int Id { get; set; } B() { } B(int id) { Id = id;} }

// Construct your lists
List<A> list = new List<A>() { new A( Id = 1 ), new A( Id = 2 ) };
List<B> list1 = new List<B>() { new B( Id = 3 ), new B( Id = 4 ) };

// Then create a linq query and convert the result to a list
List<object> all = (from x in list select (object)x).ToList();

// Now add the second list to the end of the last one
all.AddRange((from x in list1 select (object)x).ToList());

// You can use this new list to loop it like this
foreach (object item in all)
{
	// If you want to check which object we are looping you do this:
	bool obj1 = item is A;
	// Now you can cast the item to your object in a conditional operator
	Console.WriteLine(obj1 ? (item as A).Id : (item as B).Id);

	// Output:
	// 1
	// 2
  	// 3
  	// 4
}

C# merge two lists with return

var newList = a.Concat(b);

Source: stackoverflow.com

Similar codes

4 votes198 views2 answers
C# datetimepicker set weeks after today
C#
0 vote208 views1 answer
Unity how to find the smallest value out of 2 numbers
C#
8 votes195 views2 answers
Asp.net core identity get user id
C#
0 vote238 views2 answers
Sars
C#
7 votes225 views1 answer
Count number of enum values C#
C#
0 vote205 views1 answer
Enzymes chemical factory
C#
0 vote224 views1 answer
C# don't scroll up after onclick
C#
0 vote203 views1 answer
Asp.net store list in web.config
C#
4 votes217 views3 answers
Public gameobject
C#
9 votes212 views3 answers
Unity how to create 2d object from script
C#Unity