What is the use of Null Coalescing Operator ( ?? ) in C#?

The null coalescing operator (??) in C# is used to provide a default value for a nullable type or reference type when the value is null. It allows you to write more concise and readable code when handling null values.

Here's how it works:

value ?? defaultValue

If value is not null, the null coalescing operator returns value. Otherwise, it returns defaultValue.

Some common use cases for the null coalescing operator include:

1. Providing a default value for nullable types:

int? number = null;
int result = number ?? 0; // result = 0

2. Providing a default value for reference types:

string name = null;
string d...