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 l

Answer 1

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

code.Distinct();