Assign NULL value to Boolean variable

Question

I am trying to assign null value to Boolean variable but it is not taking it

bool b = null;

Answer 1

C# has two different categories of types: value types and reference types. Amongst other, more important distinctions, value types, such as bool or int, cannot contain null values.

You can, however, use nullable version of value types. bool? is a C# alias for the .NET Nullable<bool> type (in the same way string is an alias for String) and can contain null values.

Answer 2

You need to use a nullable bool:

bool? b = null;

Answer 3

For this you need to use following code to assign NULL value.

Nullable<bool> b=null;