String.Contains() method with example in C#

C# String.Contains() strategy: Here, we will find out about the Contains() technique for String class with example. C# String.Contains() Method String.Contains() technique is utilized to check whether a given string contains a substring or not, we can utilize this strategy when we have to check whether a piece of the string (substring) exists in the string. Syntax: bool String.Contains(String substring); The technique is called with "this" string, for example, the string where we need to check the substring. Parameter: substring – is the piece of the string to be checked.Return value: bool – it returns "Genuine" if a substring exists in the string or it returns "Bogus" if the substring doesn't exist in the string. Note: This strategy is case-delicate. Example: Input: string str = "Hello world!"; string str1 = "world"; string str2 = "Hi"; Function call: str.Contains(str1); str.Contains(str2); Output: True False C# Example to change over the string to characters cluster utilizing String.Contains() technique: Example 1: using System; class JustTechReview { static void Main() { // declaring string variables string str = "Hello world!"; string str1 = "world"; string str2 = "Hi"; // checking substring Console.WriteLine("str.Contains(str1): " + str.Contains(str1)); Console.WriteLine("str.Contains(str2): " + str.Contains(str2)); } } Output: str.Contains(str1): True str.Contains(str2): False Example 2: using System; class JustTechReview { static void Main() { // declaring string variables string address = "16/1 Ganesh Chandra Avenue, Kolkata-700013"; string area1 = "Sunrise Apt."; string area2 = "Ganesh Chandra Avenue"; //checking and printing the result if (address.Contains(area1)) { Console.WriteLine(area1 + " exists in the address " + address); } else { Console.WriteLine(area1 + " does not exist in the address " + address); } if (address.Contains(area2)) { Console.WriteLine(area2 + " exists in the address " + address); } else { Console.WriteLine(area2 + " does not exist in the address " + address); } } } Output: MD Computers exists in the address 16/1 Ganesh Chandra Avenue, Kolkata 700013, India. Sunrise Apt. does not exist in the address 16/1 Ganesh Chandra Avenue, Kolkata 700013, India.