C# null check chain in method call

Question

I suppose method call chain below.

void DoSomething()
{
    ObjectA a = CreateA();
    if (a != null)
    {
        a.Foo();
    }
}

ObjectA CreateA()
{
            


        

Answer 1

Starting with C# 6.0 you can use Null-Conditional Operator, which lets you make null-checking implicitly:

var result = possiblyNull?.MethodThatCanReturnNull()?.SomeProperty;

This construct will produce a null result if any element in the chain produces null.