Difference between collection and Generic in C#

Question

Please tell me the difference between collection and Generic in C# with example

Gnanavel Sekar · Answer

Both to handle the bulk of data at runtime for certain time. it's like database but it's not hold the data permanently. Collection : You may use while knew the type of data-it's under using system.collections Generic : It's represent delay the specification of type of data- it's under using system.collections.generic When you want to handle repetative process within single function/class the best choice is generic.. We may tell as Collection is to Static and Generic is to Dynamic. Generic -public class TestClass (here we can pass any types, only type enough while passing data/ creating object) Collection -public class TestClass (here we pass only int, if we want to change datatype means we have to overwrite our code in all inner blocks of code) Generic Example : using System; using System.Collections.Generic; namespace GenericApp { public class TestClass { // define an Array of Generic type with length 5 T[] obj = new T[5]; int count = 0; // adding items mechanism into generic type public void Add(T item) { //checking length if (count + 1 { obj[count] = item; } count++; } //indexer for foreach statement iteration public T this[int index] { get { return obj[index]; } set { obj[index] = value; } } } class Program { static void Main(string[] args) { //instantiate generic with Integer TestClass intObj = new TestClass (5); //adding integer values into collection intObj.Add(1); intObj.Add(2); intObj.Add(3); //No boxing intObj.Add(4); intObj.Add(5); //displaying values for (int i = 0; i { Console.WriteLine(intObj[i]); //No unboxing } Console.ReadKey(); } } }

Bikesh Srivastava · Answer

Collection: Collection classes serve various purposes, such as allocating memory dynamically to elements and accessing a list of items on the basis of an index etc. These classes create collections of objects of the Object class, which is the base class for all data types in C# . generic: Generics is a technique that enriches your programs in the following ways: It helps you to maximize code reuse, type safety, and performance. You can create generic collection classes. The .NET Framework class library contains several new generic collection classes in the System.Collections. Generic namespace.

Vishal Prajapati · Answer

hello chetan,,please follow this link: 1)http://www.dotnettricks.com/learn/csharp/difference-between-generics-and-collections-with-example 2)http://www.codeguru.com/csharp/article.php/c19001/NET-Framework-Collections-and-Generics.htm

Difference between collection and Generic in C#

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