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Sunday, February 23, 2014

Generics tutorial in C#.Net



This is tutorial about Generics in C#.Net.

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Generics allow to create classes that supports any type. Basically it creates a class templates that supports any type, And when you instantiate that class, you can specify what type you want to use.

Below is an example:
List<int> lst = new List<int> { 1, 2, 3 };

Here it is a List of interger type. It should take only integer values.

If you try to insert string values like below:
lst[0] = "AspDotNetHelp.com";

Then it will give a compaile time error, like can not implicitly vonvert type string to int.

Below is an example of a Generics class:

public class UserMaster
{
       public Int64 UserID
        {
            get;
            set;
        }
        public string Name
        {
            get;
            set;
        }
        public string EmailID
        {
            get;
            set;
        }
}

UserMaster userMaster = new UserMaster();
userMaster.UserID = 1234;
userMaster.Name = "AspDotNetHelp";
userMaster.EmailID = "aspdotnethelp24@gmail.com";

List<> lstUserMaster = new List<UserMaster>();
lstUserMaster.Add(userMaster);





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