Convert an array to string
You probably want something like this overload of String.Join:
String.Join<T> Method (String, IEnumerable<T>)
Docs:
http://msdn.microsoft.com/en-us/library/dd992421.aspx
In your example, you'd use
String.Join("", Client);
You can join your array using the following:
string.Join(",", Client);
Then you can output anyway you want. You can change the comma to what ever you want, a space, a pipe, or whatever.