Question

I have problem with this code

string.Join(",", Encoding.Unicode.GetBytes("10.10.10.11").Select(x => x.ToString("X2")));

i got error

cannot convert from 'System.Collections.Generic.IEnumerable<string>' to 'string[]'

And how can it export to comma seperated txt box ?

Answer 1

You can just convert an IEnumerable to an array of strings by calling the ToArray() extension method:

string.Join(",", Encoding.Unicode.GetBytes("10.10.10.11").Select(x => x.ToString("X2")).ToArray());

Sidenote:

Since .NET 4.0, there’s an overload of String.Join that accepts an IEnumerable<String>, making the call to ToArray obsolete.