Structur in c#

Question

Hi... What is the meaning of Structure and how can we differ for Enum?

Satyapriya Nayak · Answer

Hi Rajesh Structures and Enumerations are Value-Types. This means the data that they contain is stored as a stack on the memory. Classes are Reference-Types means they are stored as a heap on the memory. Structures are implicitly derived from a class called System.ValueType. The purpose of System.ValueType is to override the virtual methods defined by System.Object. So when the runtime encounters a type derived from System.ValueType then stack allocation is achieved. When we allocate a structure type we may also use the new keyword. We may even make a constructor of a structure but remember A No-argument constructor for a structure is not possible. The structure's constructor should always have a parameter. So if we define the following structure struct MyStruct { public int yz; } and we create a structure type MyStruct st = new MyStruct(); In case of a class no-argument constructors are possible. Class is defined using the class keyword. A struct cannot have an instance field whereas a class can. class A { int x = 5; //No error ... } struct { int x = 5; //Syntax Error } A class can inherit from one class (Multiple inheritance not possible). A Structure cannot inherit from a structure. Enum is the keyword used to define an enumeration. An enumeration is a distinct type consisting of a set of named constants called the enumerator list. Every enumeration has an underlying type. The default type is int. Note: char cant be the underlying data type for enum. First value in enum has value 0 each consequent item is increased by 1. enum colors {red green blue yellow}; Here red is 0 green is 1 blue is 2 and so on. An explicit casting is required to convert an enum value to its underlying type int x = (int)colors.yellow; Please refer the below link http://www.codeproject.com/KB/cs/csenums01.aspx http://www.dotnetuncle.com/difference/3_structure_class_enum.aspx Thanks