C#.NET - Null Conditional (or Safe Navigation) Operator (?.) and (?[]) Example

NullConditionalOrSafeNavigationOperator.cs

/* Example-1 */
// Without null conditional or safe navigation operator
string name;
int? length;
if (name != null)
{
    length = name.Length;
}
else
{
  length = null;
}


// With null conditional or safe navigation operator
int? length = name?.Length;



/* Example-2 */
void DisplayPerson(Person person)
{
    Console.WriteLine(person?.FirstName);
    Console.WriteLine(person?.LastName);
}



/* Example-3 */
var name = person?[3]?.FirstName;