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common Singleton Pattern implementation using Generic

, 17 Oct 2011
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Customized implementation of the Singleton pattern using Generics.
I read this link content(Jon Skeet) and implement the singleton pattern in a class that can be used for any object that you want to be singleton.
 
http://csharpindepth.com/Articles/General/Singleton.aspx[^]
 
Generic implementation of Jon Skeet's is here:
    public class Singleton<T> where T : new()
    {
        private static readonly Lazy<T> lazy = new Lazy<T>(() => new T());
 
        Singleton()
        {
        }
 
        public static T Instance
        {
            get
            {
                return lazy.Value;
            }
        }
    }
 
For example, we have a service:
 
public class SampleService
{
    public List<MyItemType> GetItems()
    {
        var dataList = new List<MyItemType>();
        //do some works and fill dataList
        return dataList;
    }
}
 
Everywhere I want to use SampleService, I can get a singleton instance in this way:
 
var serviceInstance = Singleton<sampleservice>.Instance;
 
var myList = serviceInstance.GetItems();

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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omid rezaei hanjani
Software Developer
Iran (Islamic Republic Of) Iran (Islamic Republic Of)
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Comments and Discussions

 
GeneralReason for my vote of 4 good PinmemberJai Mallesh10-Oct-11 19:38 
GeneralProbably needs to be tagged as .Net 4 as it is using <code>L... PinmemberReiss5-Oct-11 3:30 
GeneralRe: thanks reiss, now its be tagged as .Net 4 too Pinmemberomid rezaei hanjani17-Oct-11 23:42 
Generalthanks richard, I changed that Pinmemberomid rezaei hanjani4-Oct-11 22:01 
GeneralThis code is not fool proof. If I wish, I can directly creat... PinmemberA. Rajesh Kumar3-Oct-11 20:21 
GeneralReason for my vote of 2 The phrase "my implementation" impli... PinmemberRichard Deeming3-Oct-11 9:59 
GeneralRe: Thanks Richard, I changed "my implementation" to "generic im... Pinmemberomid rezaei hanjani4-Oct-11 23:51 

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