How can I give my class a special input?

you can try like this

{

           Foo foo = new Foo(); //creating a new instance for Foo class

           Foo fooTemp = GetFoo(); // Getting the Foo object from a method.

           foo = fooTemp;  // Assigning the new Foo object to foo


       }

       public   Foo GetFoo() // Method to get Foo object
       {
               // your coding here
           return new Foo();
       }

Hi. generally you can add property to your class when your class needs any external data for working.also properties are members that provide a flexible mechanism to read, write, or compute the values of private fields. for example :

#region Properties

private string _FirstName;
public string FirstName
{
    get { return _FirstName; }
    set { _FirstName = value; }
}

private string _LastName;
public string LastName
{
    get { return _LastName; }
    set { _LastName = value; }
}

#endregion

#region Constructor

public Person(string firstName, string lastName)
{
    this.FirstName = firstName;
    this.LastName = lastName;
}

#endregion

#region Methods

public string Greeting()
{
    string message = string.Format("Hi {0} {1}", this.FirstName, this.LastName);
    return message;
}

#endregion

now you can create instance of Person class like following:

Person myPer = new Person();
myPer.FirstName = "ali";
myPer.Greeting();

Hello friend,

firstly

Quote:

Can I give my class a specific input

Definately you can, to give inputs to classes itself the concept of parametrized constructor was introduced.

Constructors are of 2 types:

Quote:

parameterless and parameterized

The default is called a parameterless constructor:
Now suppose you create a new class like this:

public class Class1
   {
   }

From the main method i can call it like this:

Class1 c = new Class1();

- Take notice: Are you passing any parameters inside the parenthesis of new Class1(). No you are not. It is "parameterless". Thats why i call it a parameterless constructor.


Now lets say according to some situation i want to initialize a method with a value when a class is initialized( At the start when the class is initialized) , then you can do this:

Class1 c1 = new Class1("Rahul");

and in Class1 i will say:

public Class1(string s)
       {
           string a = s;
           Console.WriteLine(a);
       }

Now summing up everything i can say:
In Class1:

public class Class1
   {

       public Class1()
       {

       }

       public Class1(string s)
       {
           string a = s;
           Console.WriteLine(a);
       }


   }

In the main i can say:

Class1 c = new Class1();
           Class1 c1 = new Class1("Rahul");

These 2 above statements are called

Quote:

overloads of a class

Here there are just 2 overloads, you can specify many overloads.

hey friend just one homework: try putting static "keyword" before any constructor for example :

public static Class1(string s)
    {
        string a = s;
        Console.WriteLine(a);
    }

- Now compile the code and tell me what happens? and why?

good luck friend. I hope this has helped you. And i hope you have a plethora of doubts on this. And please ask me so that even i gain knowledge from your doubts.


Thanks and happy learning

Greetings,

You can define a property in your class and set the value to that property.

For Example:

class Foo
   {
       int id = -1;
       public int ID
       {
           set { id = value; }
           get { return id; }
 
       }
   }
 
  Foo f = new Foo();
  f.ID = 100;

Regards
Dominic