Write a list in a single line in C#

Question

If I have a list

var myList = new List<string>();

and I add a couple of strings

myList.Add("Hello");
myList.Add("World");
myList.Add("!");

How do I print the entire list on one line? If I try Console.WriteLine(myList); the console prints "System.Collections.Generic.List`1[System.String]" instead of "Hello World !". I've tried

myList.ForEach(Console.WriteLine);

but that prints "Hello", "World" and "!" on separate lines instead of on one line. How would I go about printing the list on one line?

`Console.WriteLine(string.Join(Environment.NewLine, myList));` — Dmitry Bychenko, Sep 15 '20 at 20:24
Use string.Join like the duplicate and suggested answers. Unlike some answers in the duplicate, there is no need for ToArray. — user2864740, Sep 15 '20 at 20:33
Actually, ```myList.ForEach(i => Console.Write(i + " ")); ``` is simpler... — Burak, Sep 15 '20 at 21:15

mrbm · Answer 1 · 2020-09-15T20:51:24.987

3

Use string.Join like this

  var myList = new List<String>{ "Hello", "world", "!" };
  Console.WriteLine(string.Join(" ", myList ));

The result will be: Hello world !

edited Sep 15 '20 at 20:51

answered Sep 15 '20 at 20:25

mrbm

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score 0 · Answer 2 · answered Sep 15 '20 at 20:25

You can try to Join all the items of myList into single string, then print it:

 // Hello
 // World
 // !
 Console.WriteLine(string.Join(Environment.NewLine, myList));

Or (let's change delimiter)

 // Hello World !
 Console.WriteLine(string.Join(" ", myList));

Write a list in a single line in C#

2 Answers2