Question

I have one class file JobSeekerBO it’s has variable

   string _username = string.Empty;
   string _password = string.Empty;

and i set value as below

public string Username
{
    get { return _username; }
    set { _username = value; }
}

public string Password
{
    get { return _password; }
    set { _password = value; }
}

but problem is that that variable i access in another class file class1.cs i create object of that class file

JobSeekerBO objBO = new JobSeekerBO();

but i can’t access Username and Password in class1.cs class file from my JobSeekerBO.cs file

I also try to make that variable public as per below

public string _username = string.Empty;
public string _password = string.Empty;

same class file varible without public access modifier we can access in file1.aspx.cs file

So please tell me how to access variable and method of one .cs file to another .cs file.

Answer 1

You can not access _username and _password outside your class because they are private by default. That means they are accessible only within the body of the class. But you have the Public properties which sets and gets values on these fields. So you should use those public Properties.

JobSeekerBO objBO = new JobSeekerBO();
objBo.Username="someusername";
objBo.Password="myPassword";

Assuming your class look like this

public class JobSeekerBO
{ 
   string _username = string.Empty;
   string _password= string.Empty;      

   public string Username
   {
        get { return _username; }
        set { _username = value; }
   }        
   public string Password
   {
        get { return _password; }
        set { _password = value; }
   }    
}

Generally, you should use fields only for variables that have private
or protected accessibility. Data that your class exposes to client
code should be provided through methods, properties and indexers.

More about class fields here in msdn

EDIT: After looking at your code.

You are trying to set the Public property value in a wrong place. You can not do it there. You should do it in a method ( even in your Constructor is fine).

public class MailRepositary
{
  JobSeekerBO objBO = new JobSeekerBO();
  public MailRepositary()
  {
      objBo.UserName="works from constructor";
  }
  public void SomeMethod()
  {
      objBo.UserName="works from method also";
  }
}