What is the meaning of the "this" keyword in c#

The "this" keyword refers to the class which you are currently writing code in it. I mainly use it to distinct between method parameters and class fields.

For example, let's assume you have the following class:

public class Person
{
   string name = ""; //Field "name" in class Person
   
   //Constructor of the Person class, takes the name of the Person
   //as argument
   public Person (string name)
   {
       //Assign the value of the constructor argument "name" to the field "name"
       this.name = name; 
       //If you'd miss out the "this" here (name = name;) you would just assign the
       //constructor argument to itself and the field "name" of the
       //Person class would keep its value "".
   }
}

Hope I could make it clear to you.
You can find additional reference information at the according MSDN page[^].

cheers,
Marco Bertschi

Depending on where you r using it ,it has different meanings:-
1.Reference to current instance of class
2.Call another constructor from a constructor in same class.
3.Declare indexer
Below example covers above 3

class abc
{
string x; //class member
public abc(string x)
{
//referring to current instance
this.x=x;//("this.x" refers to class member)
}
//calling another constructor
public abc():this("xyz")//calls abc(string x) before abc()
{
}
//declaring an indexer
public int this[int index]
{
get{return x[index];}
set{x[index]=value;}
}

4.also used in Extension methods

These are some meanings I know about "this" keyword.

hi!!
This keyword is used to refer to an instance of the class!!!!!!!!!!!

take a look of this link

http://msdn.microsoft.com/en-us/library/dk1507sz%28v=vs.71%29.aspx[^]