How to check in C# whether the string array contains a particular work in a string array?

In C#, String.Contains() is a string method. This method is used to check whether the substring occurs within a given string or not.

It returns the boolean value. If substring exists in string or value is the empty string (""), then it returns True, otherwise returns False.

Exception − This method can give ArgumentNullException if str is null.

This method performs the case-sensitive checking. The search will always begin from the first character position of the string and continues until the last character position.

Example 1

Contains is case sensitive if the string is found it return true else false

static void Main(string[] args){    string[] strs = { "Sachin", "India", "Bangalore", "Karnataka", "Delhi" };    if (strs.Contains("sachin")){       System.Console.WriteLine("String Present");    } else {       System.Console.WriteLine("String Not Present");    }    Console.ReadLine(); }

Output

String Not Present

Example 2

static void Main(string[] args){    string[] strs = { "Sachin", "India", "Bangalore", "Karnataka", "Delhi" };    if (strs.Contains("Sachin")){       System.Console.WriteLine("String Present");    } else {       System.Console.WriteLine("String Not Present");    }    Console.ReadLine(); }

Output

String Present

Example 3

static void Main(string[] args){    string[] strs = { "Sachin", "India", "Bangalore", "Karnataka", "Delhi" };    var res = strs.Where(x => x == "Sachin").FirstOrDefault();    System.Console.WriteLine(res);    Console.ReadLine(); }

Output

Sachin

Example 4

static void Main(string[] args){    string[] strs = { "Sachin", "India", "Bangalore", "Karnataka", "Delhi" };    foreach (var item in strs){       if (item == "Sachin"){          System.Console.WriteLine("String is present");       }    }    Console.ReadLine(); }

Output

String is present