bool type in C# it is used to declare variables to store the Boolean values, true and false.
Examples:
bool b = true;
MessageBox.Show(b.ToString()); // Display True
b = null; //Error: Cannot convert null to 'bool' because it is a non-nullable value type
If you need a Boolean variable that can also have a value of null, use bool?
bool? b = true;
b = null; //Ok
