Difference between struct and class in C#

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1. Definition:

• A struct is a value type, while a class is a reference type.

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2. Memory Allocation:

• Structs are typically allocated on the stack, while classes are allocated on the heap.

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3. Default Behaviour:

• Structs are value types and are copied by value, while classes are reference types and are copied by reference.

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4. Inheritance:

??? Structs do not support inheritance, while classes support single inheritance.

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5. Nullability:

• Structs cannot be null unless they are wrapped in a nullable type, while classes can be assigned a null value.

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6. Performance:

• Structs are generally more efficient in terms of memory and performance for small, simple data types, while classes provide more flexibility and are better suited for complex data and behaviour.

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7. Usage:

• Use structs for small, lightweight objects that represent simple data types, such as coordinates, colours, or key-value pairs.
• Use classes for more complex objects that require behaviour, encapsulation, and inheritance, such as entities in an object-oriented design.

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8. Example:

???// Struct example

   public struct Point
   {
       public int X;
       public int Y;
   }
 

   // Class example

   public class Person
   {
       public string Name;
       public int Age;
   }