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Data types in C# and .NET


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Data types in C# and .NET

Data Types are the basic building block of any language.

A D V E R T I S E M E N T
Microsoft has tried to standardise the data types in .NET framework by introducing a limited, fixed set of types that can be used to represent almost anything in programming world.

C++ was very rich in data types, but that leads to confusion too. Especially, when we write components that may be consumed by applications written in other platforms, we have to make sure the types used are compatible with other platforms too!

NET types start from a clean slate. All .NET languages share the same types. So, they are all compatible and no worries. This means, we can call C# code from VB.NET and vice versa, without worrying about type conversions.

NET data types are either structures or classes, part of the System namespace. For example, the following data types are implemented as struct in .NET:

  • Int16
  • Int32
  • Double

  • (String is implemented as a class in .NET.)
    If you are not very familiar with struct and class, don't worry about it. We can just use them as if they are simple data types.

    Here is how we can declare variables of type Int, Double and String:

  • Int16 age, employee Number;
  • Double salary;
  • String name, address;

  • we can use any of the .NET data types directly in any .NET language - in C#, VB.NET or xyz. NET. But in addition to the .NET types, each language provides a set of primitive types, which map to the corresponding types in .NET class library. This is why we may see some people use string and some others use String. There is no big difference. string is a primitive data type in C# and String is the corresponding class in .NET class library. The string in C# is mapped to the class in .NET class library. So, whether we use string or String, there is no real difference.




    Data Types in C# and the corresponding class/struct in .NET class library

    The following list shows the list of data types available in C# and their corresponding class/struct in .NET class library.

     

    C# Data type

     

    Mapped to .NET class/struct

     

    sbyte

     

    System.SByte

     

    byte

     

    System.Byte

     

    char

     

    System.Char

     

    float

     

    System.Single

     

    decimal

     

    System.Decimal

     

    double

     

    System.Double

     

    ushort

     

    System.UInt16

     

    short

     

    System.Int16

     

    uint

     

    System.UInt32

     

    int

     

    System.Int32

     

    ulong

     

    System.UInt64

     

    long

     

    System.Int64

     

    bool

     

    System.Boolean

     

    string

     

    System.String

     

    object

     

    System.Object



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    Keywords Data types in C# and .NET, system c#, c# c++, c# component, c# dotnet, vb c#, c# example, convert c#, visual c#, data method, data controls, value data, c# control, vb data, c# application, c# sample, system data, data form, c# form, csharp c#, custom c#, use c#, format data, c# create

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