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C# Thread

Discussion in 'C#' started by jessysmith1234, Jul 22, 2014.

  1. #1
    How to implement singleton design pattern in C#?How to use nullable types in .Net?
    SEMrush
     
    jessysmith1234, Jul 22, 2014 IP
    SEMrush
  2. sodevrom

    sodevrom Member

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    #2
    Hello, well it's pretty easy if you do a google search (for singleton pattern):
    http://csharpindepth.com/articles/general/singleton.aspx

    About nullable types, you cannot define int, double, char as null in C#
    To do that you can use nullable type. This is written like: int? myvar=null;

    This is interpreted like Nullable<int> myvar=new Nullable<int>();

    Good luck!
     
    sodevrom, Jul 29, 2014 IP
  3. BotBuilding

    BotBuilding Peon

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    #3
    http://csharpindepth.com/articles/general/singleton.aspx

    Found this.Hope it helps
     
    BotBuilding, Aug 25, 2014 IP
  4. www.gaapps.com

    www.gaapps.com Greenhorn

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    #4
    public class Singleton
    {
            private static Singleton instance;
    
            private Singleton()
            {
           
            }
    
            public static Singleton GetInstance()
            {
                    if(instance==null)
                    {
                            instance=new Singleton();
                    }
                    return instance;
            }
    }
    Code (markup):
     
    www.gaapps.com, Aug 30, 2014 IP
  5. ekaddu

    ekaddu Member

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    #5
    just declare a class as static and you have a class that does similar job as singleton without unnecessary coding.
     
    ekaddu, Feb 7, 2015 IP
  6. zinist

    zinist Banned

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    #6
    How to use nullable types in .Net
    ans:

    Data Types are divided into two catagories
    Value Type :int,float,double
    Reference Type :string ,class
    by default value types are non nullable to make them nullable you can use ?
    int i = null (not possible)
    int ?i= null(possible)
     
    zinist, Jun 27, 2015 IP