Check out example codes for "c# list join". It will help you in understanding the concepts better.

Code Example 1

String.Join(" ", elements)

Code Example 2

var combined = String.Join(",", new String[]{"a","b"});
// a,b

Code Example 3

List<string> names = new List<string>() { "John", "Anna", "Monica" };
var result = String.Join(", ", names.ToArray());

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