Is there any string.Contains or related method

Question

I am writing a code to if characters from 1 string are present in another string. I used string.Contains but its not solving my case

string str = "abc";
string str2 = "ac";

if(str.Contains(str2))
{
    Console.WriteLine("true");
}

I want result to be true. but its not returning true

Answer 1

How about

string str = "abc";
string str2 = "ac";

bool containsAll = !str2.Except(str).Any();

because

Answer 2

I am writing a code to if characters from 1 string are present in another string.

I guess you want to check: " if All characters from 1 string are present in another string."

string str = "abc";
string str2 = "ac";

Console.WriteLine(str2.All(x => str.Contains(x)));