All the code from lesson 1.

Lesson1.cs

using System;

class Class1
{
	public static void Main ()
	{
		string someString = ""; //Declares a string called someString 
								//and sets it to nothing

		int someInt = 0; //Declares an int called someInt 
						 //and sets it to 0

		float someFloat = 3.1415f; //Declares a float called someFloat
								   //and set it to pi


		Square(3);      //Calls the square function and passes it
						//the int value 3
		Multiply(someInt, 4); //Passes someInt and 4 into the
							 //Multiply function
	}

	static void Print(string message) //makes room for a string
	{
		Console.WriteLine(message);  //Writes the message to the screen
	}

	static void Square(int number) //Makes room for an int
	{
		int result = number * number; //Gets the result by multiplying the 
									  //passed int 'number' by itself 
		Print(result.ToString());
	}

	static void Multiply(int num1, int num2) //Makes room for two ints
	{
		int result = num1 * num2;      //Gets the result by multiplying the 
									  //num1 by num2 
		Print(result.ToString());
	}
}