List<string> numbersStrLst = new List<string>
{ "One", "Two", "Three","Four","Five"};
Console.WriteLine(String.Join(", ", numbersStrLst));//Output:"One, Two, Three, Four, Five"
int[] numbersIntAry = new int[] {1, 2, 3, 4, 5};
Console.WriteLine(String.Join("; ", numbersIntAry));//Output:"1; 2; 3; 4; 5"