Primitive data types are used for storing fundamental types of data, such as strings, integers, and real numbers. So when you declare a value type variable, the compiler sets aside, or allocates, a chunk of memory that is big enough for that variable. The way reference types work is different. When you are working with a reference type, you are using two things, an object that is created in memory and a variable that references to the object. The variable does not hold an actual piece of data with which your program will work. Instead it holds a special value known as a reference, which links the variable to the object.
