Question

Is there a way to change “ABCDEFGHIJKLMNOP” to “ABCD-EFGH-IJKL-MNOP” using string.format() function or perhaps LINQ ?
I am using this statement

Out= String.Format("{0}-{1}", String.Format("{0}-{1}-{2}", In.Substring(0, 4), In.Substring(4, 4), In.Substring(8, 4)), In.Substring(12, 4));  

is there a better and clearer way to accomplish this?

Answer 1

You could use string.Format, but you would still have to use SubString to get the different parts.

You should probably just use Insert:

string result = myString.Insert(12, "-").Insert(8, "-").Insert(4, "-");

LINQ is overkill for something like this.