A struct is a value type, while a class is a reference type. When we instantiate a class, memory will be allocated on the heap. When struct gets initiated, it gets memory on the stack. Classes can have explicit parameter less constructors. But structs cannot have this. Classes support inheritance. But there is no inheritance for structs. A struct cannot inherit from another struct or class, and it cannot be the base of a class. Like classes, structures can implement interfaces. We can assign null variable to class. But we cannot assign null to a struct variable, since structs are value type. We can declare a destructor in class but can not in struct.