In C#, classes and structs are both data types that can be used to create objects. However, there are some key differences between the two.

Classes

• Classes are reference types. This means that when a class object is created, a reference to the object is stored on the heap.
• Classes can be inherited from other classes. This allows you to create new classes that share the properties and methods of existing classes.
• Classes can be virtual. This allows you to create objects that can be used polymorphically.
• Classes can be sealed. This prevents other classes from inheriting from them.

Structs

• Structs are value types. This means that when a struct object is created, the actual data for the object is stored on the stack.
• Structs cannot be inherited from other structs.
• Structs cannot be virtual.
• Structs cannot be sealed.

Here is a table that summarizes the key differences between classes and structs:

When to use classes

Classes are a good choice for data types that need to be inherited from other classes, or that need to be used polymorphically. For example, you might use a class to represent a user, or an animal.

When to use structs

Structs are a good choice for data types that are small and simple, or that need to be passed around by value. For example, you might use a struct to represent a point, or a color.

Ultimately, the best type of data type to use will depend on the specific requirements of the situation.

Differences between Class and Struct in C#