How to get distinct characters?

Question

I have a code like

string code = "AABBDDCCRRFF"; 

In this code, I want to retrieve only distinct characters

The Output should be like:

ANS: ABDCRF 

Answer 1

string code = "AABBDDCCRRFF"; string answer = new String(code.Distinct().ToArray()); 

Answer 2

Linq's Distinct returns distinct elements from a sequence. As the String class implements IEnumerable<char>, Distinct in this context returns an IEnumerable<char> containing all of the unique characters in the string.

code.Distinct();