How to Check if a String contains given Substring in C# - Step by Step Examples

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How to Check if a String contains given Substring in C# ?

Answer

To check if a string contains a given substring in C#, you can use the 'Contains' method of the String class.

✐ Examples

1 Check if a String contains given Substring using 'Contains' method

In this example,

We create a function 'ContainsSubstring' that takes a string and a substring as input.
We use the 'Contains' method of the string object to check if the substring is present in the string.
If the substring is found, 'true' is returned; otherwise, 'false'.
Finally, we print the result.

C# Program

// C#
class Program
{
    static bool ContainsSubstring(string str, string substr)
    {
        return str.Contains(substr);
    }

    static void Main()
    {
        string str = "Hello World";
        string substr = "World";
        bool contains = ContainsSubstring(str, substr);
        Console.WriteLine($"String contains substring '{substr}': {contains}");
    }
}

Output

String contains substring 'World': True

Summary

In this tutorial, we learned How to Check if a String contains given Substring in C# language with well detailed examples.