C#InTheConsoleProgram

// All these files were created with simple notepad in the console.
// type: notepad Program.cs and type the program
// set Path=%Path%;C:\WINDOWS\Microsoft.NET\Framework\v3.5
// echo %Path%
// 1. use to compile with other files (everythign in one assembly): csc /t:exe /out:Program.exe *.cs

// 2. or create a library dll and use reference
// 2.1. csc /t:library /out:People.dll Person.cs Student.cs Athlete.cs
// make all classes public othervise they are internal
// 2.2. csc /reference:People.dll /t:exe /out:ProgramRef.exe Program.cs

using System;

namespace Stoyan
{
    class Program
    {
        static void Main()
        {
            Console.WriteLine("Hello world!");

            Person person1 = new Person("Stoyan", 52);
            person1.IntroduceYourSelf();

            Person student1 = new Student("Kircho", 25, "dasda432s");
            student1.IntroduceYourSelf();

            Person athlete1 = new Athlete("Krisi", 24, "Box");
            athlete1.IntroduceYourSelf();
        }
    }

/*
    class Person
    {
        public string Name {get; set;}
        public int Age {get; set;}

        public Person(string name, int age)
        {
            Name = name;
            Age = age;
        }

        public void IntroduceYourSelf()
        {
            Console.WriteLine("My name is {0}. I am {1} years old!", Name, Age);
        }
    }

*/
}

/*

http://stackoverflow.com/questions/14728422/c-sharp-importing-class-into-another-class-doesnt-work
using is for namespaces only - if both classes are in the same namespace just drop the using.

You have to reference the assembly created in the first step when you compile the .exe:

csc /t:library /out:MyClass.dll MyClass.cs
csc /reference:MyClass.dll /t:exe /out:MyProgram.exe MyMainClass.cs
You can make things simpler if you just compile the files together:

csc /t:exe /out:MyProgram.exe MyMainClass.cs MyClass.cs
or

csc /t:exe /out:MyProgram.exe *.cs
EDIT: Here's how the files should look like:

MyClass.cs:

namespace MyNamespace {
    public class MyClass {
        void stuff() {

        }
    }
}
MyMainClass.cs:

using System;

namespace MyNamespace {
    public class MyMainClass {
        static void Main() {
            MyClass test = new MyClass();
        }
    }
}
*/