Question

I’ve read that Convert.ToString should handle null, but it doesn’t work when it’s passed a null object in my code

In this case the object “Name” is null.

var name = Convert.ToString(Name.LastName);

I get Object reference not set to an instance of an object.

Answer 1

The exception is not caused by Convert.ToString().

The exception is in your code because you are trying to get the value of LastName from a null reference. This causes the runtime exception.

To fix it, you’ll need to check that Name is not null before you try to access LastName.

var name = Name != null ? Convert.ToString(Name.LastName) : null;