Answer / msg

Here we have two ways to assign a default value.
1. By using Nullcoalsce(??) Operartor
2. by using getvalueordefault() Method.

ex: int? a= null;
int b = a ?? 10;
Or
int b =a.getvalueordefault(); //if null will return zero
or
int b = a. getvalueordefault(10);// if null will retrun 10

--Nested nullable types are NOT Allowed

-By MSG

Answer / msg

Nested nullable types are not allowed. The following line
will not compile:
Nullable<Nullable<int>> n;

- By MSG

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