C ＃ learning 1: value type and reference type

One .C# Common value types and reference types in

1. Value type ：

1. All numeric types
2. character Char type
3. bool type
4. Structure Struct
5. enumeration enum

1. Reference type ：

1. class
2. Array
3. entrust
4. Interface
5. string character string

Two . Difference between value type and reference type

1. Reference types allocate memory in the heap , Value types allocate memory on the stack
2. Assigning a variable of a reference type to a variable of another reference type only copies the memory address , Value types are copied field by field
3. Memory reclamation for reference types is handled by GC Recycling , The memory of the value type will be at the end of the scope , Automatic release
4. Reference types inherit from System.Object, Value types inherit from System.ValueType（ Be careful ： and System. ValueType
   And inherit from System.Object)

3、 ... and . Instances of value types and reference types in memory

1. Value type instance in memory ： Use structure to illustrate

2. Instance in reference type memory ： Use classes to describe

Four . Value types and reference types copy instances in code

Value type copy instance ：

Reference type copy instance ：