Does substring exist in string?

The string. Contains() method in C# is case sensitive . And there is not StringComparison parameter available similar to Equals() method, which helps to compare case insensitive.4 Oca 2014

If a String contains another String then it’s known as a substring. The indexOf() method accepts a String and returns the starting position of the string if it exists, otherwise, it will return -1. For example “fastfood”.

The contains() method checks whether a string contains a sequence of characters . Returns true if the characters exist and false if not.

Yes, contains is case sensitive . You can use java.