How to determine if one string contains all the characters of another string?

Question

C++ / C#

Please tell me if there is a function in C# that would check for the presence of all characters of one string in another and would return the corresponding boolean value.

Answer 1

msdn.microsoft.com/en-us/library/dy85x1sa (v=vs.110).aspx
Here's what you need.

Answer 2

How about ordering the characters of both strings, removing duplicates if necessary (for one more pass of each string), and then just comparing the two resulting strings?