特集「私がJavaからC#に乗り換えた10の理由」について

public delegate void SampleEvent1Handler(object sender, EventArgs e);
public delegate void SampleEvent2Handler(object sender, EventArgs e);

public class Class1
{
 public event SampleEvent1Handler SampleEvent1;
 ...
}

public class Class2
{
 public event SampleEvent2Handler SampleEvent2;
 ...
}

public class MainClass
{
 private void listenClass1SampleEvent1(object sender, EventArgs e)
 {
  Class1 c1 = (Class1)sender;
  c1......  
 }

 private void listenClass2SampleEvent2(object sender, EventArgs e)
 {
  Class2 c2 = (Class2)sender;
  c2....
 }
 private static void Main(string[] args)
 {
  Class1 c1 = new Class1();
  Class2 c2 = new Class2();
  MainClass m = new MainClass();
  //error : c1.SampleEvent1 += new SampleEvent2Handler(m.listenClass1SampleEvent1);
  c1.SampleEvent1 += new SampleEvent1Handler(m.listenClass1SampleEvent1);
  //error : c2.SampleEvent2 += new SampleEvent1Handler(m.listenClass2SampleEvent2);
  c2.SampleEvent2 += new SampleEvent2Handler(m.listenClass2SampleEvent2);
  ...
 }
}

public class Test
{
	private string x;

	public Test()
	{
		x = "ABC";
	}
		
	public string ST {get{ return x; } set{x = value;}}

	public static void Main(string[] args)
	{
		Test c = new Test();
		string p = c.ST;
		p = "HOGE";
		System.Console.WriteLine("P={0},c.ST={1},x={2}",p,c.ST,c.x);
	}
}