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C# String IsNullOrEmpty()

The C# IsNullOrEmpty() method is used to check whether the specified string is null or an Empty string. It returns a boolean value either true or false.

Signature

Parameter

str: it is a string parameter which is used to check string.

Return

It returns boolean value.

C# String IsNullOrEmpty() Method Example

    using System; 
    public class StringExample  
    {  
        public static void Main(string[] args)  
        {  
           string s1 = "Hello C#";
           string s2 = "";
           bool b1 = string.IsNullOrEmpty(s1);
           bool b2 = string.IsNullOrEmpty(s2);
           Console.WriteLine(b1);
           Console.WriteLine(b2);
         }  
    }  

Output:

False
True

Next TopicC# String IsNullOrWhiteSpace()

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