ProgramClassTest.cs

using System;
					
public class Program
{
	public static void Main()
	{
		var currentCount = Person.GetCounter;
		Console.WriteLine(string.Format("Current Person Count: {0}", currentCount));
		
		var matt = new Person("matt", "lizzy", "pizzy");
		var nick = new Person("nick", "yizzy", "fizzy");
		
		Console.WriteLine(string.Format("Nick: {0} {1} {2}", nick.FirstName, nick.MiddleName, nick.LastName));
		Console.WriteLine(string.Format("Matt: {0} {1} {2}", matt.FirstName, matt.MiddleName, matt.LastName));		
				
		var newCount = Person.GetCounter;
		Console.WriteLine(string.Format("New Person Count: {0}", newCount));
	}
	
	
	public class Person
	{				
		// this is a private field - only code in this class can access it
		private static int _counter; 
		// public getter for our counter
		public static int GetCounter { get { return _counter; } }
		
		// private fields
		private string _firstName;
		private string _lastName;
		
		// public getter/setter that let us manipulate private fields
		public string FirstName 
		{ 
			get { return _firstName; }
			set { _firstName = value; } 
		}
		
		public string LastName 
		{ 
			get { return _lastName; } 
			set { _lastName = value; } 
		}
		
		// or you could just expose props publicly, and the data behind them, which isnt recommended
		public string MiddleName { get; set; }
		
		// class constructor - you can tell because the 'method' is named the same as the class
		public Person(string fn, string ln, string mn)
		{
			FirstName = fn;
			LastName = ln;
			MiddleName = mn;
			// incriment counter
			_counter++;
		}
	}
}

/** OUTPUT:
Current Person Count: 0
Nick: nick fizzy yizzy
Matt: matt pizzy lizzy
New Person Count: 2
*/