| Class | Struct |
|---|
| Classes in C# support inheritance. | Structs do not support inheritance. |
| The class has a default constructor. | No default constructor is defined for the struct. |
| Classes are stored in a heap because they are reference types. | Structs are stored in the stack because they are value types. |
| The garbage collector automatically frees memory used by class objects when they are no longer in use. | Memory allocated to the struct is automatically reclaimed. |
| When a class object is passed as a parameter to a function, a reference to the object is copied. This means that changes made to the object inside the function will also affect the original object outside the function. | When a struct is passed as a parameter to a function, its value is copied. As a result, changes made to the struct inside the function do not affect the original struct outside the function. |