The correct answer is: B. Struct
A struct is a user-defined data type that groups together related data items. It is similar to a class, but it does not have methods.
A class is a user-defined data type that defines a blueprint for creating objects. It can have properties, methods, and events.
A structDef is a keyword that is used to define a struct.
An Sdef is not a valid keyword in C#.
Here is an example of a struct:
c#
struct Point
{
public int X { get; set; }
public int Y { get; set; }
}
This struct defines a data type called Point. A Point has two properties, X and Y.
Here is an example of a class: