How can I check if a string contains a character in C#?

Question

Is there a function I can apply to a string that will return true of false if a string contains a character.

I have strings with one or more character options such

Answer 1

You can use the IndexOf method, which has a suitable overload for string comparison types:

if (def.IndexOf("s", StringComparison.OrdinalIgnoreCase) >= 0) ...

Also, you would not need the == true, since an if statement only expects an expression that evaluates to a bool.