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C# - DataTypes

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Data Types


Value Type 


  • Variable contains value directly 
  • Derived implicitly from the System.ValueType
  • Cannot derive a new type from a value type.


example of value type - int, float, enum.

Builtin data types

apart from the above mentioned built in data types we need to discuss two special type of data types - Struct and Enum

 Struct - A struct type is a value type that is typically used to encapsulate small groups of related variables

 In the below example we are using a struct variable Book which has one decimal value price and two string variables title and author. Here we can see how to declare and use a struct variable. 




Enum - The enum keyword is used to declare an enumeration, a distinct type that consists of a set of named constants called the enumerator list. In the below example we can see how to declare and use enum variables.






Reference Type
  • Variables of reference types store references to their data
  • Two variables can reference the same object; therefore, operations on one variable can affect the object referenced by the other variable



Dynamic Type

  • The type is a static type, but an object of type dynamic bypasses static type checking
  • At compile time, an element that is typed as dynamic is assumed to support any operation






Anonymous Type

  • Anonymous types provide a convenient way to encapsulate a set of read-only properties into a single object without having to explicitly define a type first
  • The type name is generated by the compiler and is not available at the source code level


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