/TypeScript/C# merge two lists different types

C# merge two lists different types

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 different types

// 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
}

Source: stackoverflow.com

Similar codes

-3 votes193 views1 answer
How to implement Bootstrap 4 for Angular 2 ngb-pagination
TypeScript
2 votes174 views1 answer
Rror: failed to init transaction (unable to lock database) error: could not lock database: File exists if you're sure a package manager is not already running, you can remove /var/lib/pacman/db.lck
TypeScript
0 vote150 views1 answer
How to make the score add on while its in a loop in python
TypeScript
0 vote179 views1 answer
Common mistakes in testing
TypeScript
0 vote147 views1 answer
Real time charts in flutter
TypeScript
0 vote137 views1 answer
Convert list to list of lists on every n elements python
TypeScript
2 votes158 views1 answer
Delete folder and its subfolders in python
TypeScript
2 votes135 views1 answer
Components meaning
TypeScript
-1 vote145 views1 answer
Components of http request
TypeScript
0 vote141 views2 answers
Check if a temporary table exists and delete if it exists
TypeScript