Add separator to string at every N characters?

Question

I have a string which contains binary digits. How to separate string after each 8 digit?

Suppose the string is:

string x = \"111111110000000011111111         


        

Answer 1

One way using LINQ:

string data = "111111110000000011111111000000001111111100000000";
const int separateOnLength = 8;

string separated = new string(
    data.Select((x,i) => i > 0 && i % separateOnLength == 0 ? new [] { ',', x } : new [] { x })
        .SelectMany(x => x)
        .ToArray()
    );