Null Coalescing Operator (??) in C#

Published on April 11, 2013 by Senthil Kumar

Filed under C#

Last modified April 11, 2013

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The .NET Framework provides the Null Coalescing Operator (??) which is a kind of binary operator and enables the developers to quickly check for the null values .

The Null Coalescing Operator (??) in C# can be used with Nullable types as well as reference types .

For example , a??b .If a is not null then assign the value a else take the value b.

Null Coalescing Operator (??) in C#

Below is a sample sourecode demonstrating the usage of Null Coalescing Operator (??) in C#

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace ConsoleApplication1


internal class Program


// Null Coalescing Operator (??) in C#

private static void Main(string[] args)


int? IntValue = null;

int output = IntValue ?? -1;

Console.WriteLine("Result = " + output.ToString());





Null Coalescing Operator (??) in C#

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