int array to string

Question

In C#, I have an array of ints, containing digits only. I want to convert this array to string.

Array example:

int[] arr = {0,1,2,3,0,1}; 

How can I convert this to a string formatted as: "012301"?

Answer 1

at.net 3.5 use:

 String.Join("", new List<int>(array).ConvertAll(i => i.ToString()).ToArray()); 

at.net 4.0 or above use: (see @Jan Remunda's answer)

 string result = string.Join("", array); 

Answer 2

You can simply use String.Join function, and as separator use string.Empty because it uses StringBuilder internally.

string result = string.Join(string.Empty, new []{0,1,2,3,0,1}); 

E.g.: If you use semicolon as separator, the result would be 0;1;2;3;0;1.

It actually works with null separator, and second parameter can be enumerable of any objects, like:

string result = string.Join(null, new object[]{0,1,2,3,0,"A",DateTime.Now});