use of this keyword

Question

hi guys can any one tell me the use of this keyword in C# language i want to know what exactly the code ****string person(string fName string lName) { this.fName=FirstName; this.lName=LastName; }**** means and i want to know all the uses of this keyword ................thanks in advance

Bechir Bejaoui · Answer

Imagine this situation public class Person { public string FirstName { get; set; } public string LastName { get; set; } public int identifier { get; set; } //The overloaded constructor public Person(string FirstNamestring LasName int identifier) { //TO DO initialize the Person members within the constructor scope } } OK how to distiguish between the FirstName(member of the class instance) and FirstName(argument in the constructor) the world this enables the compiler distiguish between the two element inspite of the same name same thing for the others I mean LastName and identifier so I write public class Person { public string FirstName { get; set; } public string LastName { get; set; } public int identifier { get; set; } //The overloaded constructor public Person(string FirstNamestring LasName int identifier) { //Class member = Constructor arguement this.FirstName = FirstName; this.LastName = LastName; this.identifier = identifier; } } Ok you tell me I can change the arguement nomination firstName or fn or fname and avoid the conflict in the names I tell you the problem will persist you tell me how? I tell you the class is used to derive several instances Person me = new Person(Bejaoui Bechir 1); Person you = new Person( anveshreddy amaravadi  2); Person vijaya = new Person(VijayaKadyiala3); Ok the problem is how the compiler can differenciate between the FirstName of me the FirstName of you and the FirstName of Vijaya is by using the this Keyword who serves as a pointer that point to the targeted FirstName among the rest of the FirstNames of the other instances

anveshreddy amaravadi · Answer

miss vijaya kadiyala i already know the answer you gave but unable to get understood can you give me a more descriptive answer

Vijaya Kadiyala · Answer

Hi The this keyword refers to the current instance of the class. Static member functions do not have a this pointer. The this keyword can be used to access members from within constructors instance methods and instance accessors. The following are common uses of this : To qualify members hidden by similar names for example: public Employee(string name string alias) { this.name = name; this.alias = alias; } To pass an object as a parameter to other methods for example: CalcTax(this); Check out the below link: http://msdn.microsoft.com/en-us/library/dk1507sz%28VS.71%29.aspx Thanks -- Vijaya Kadiyala

use of "this" keyword