C# 0 The Complete Reference

Avoiding Unreachable Code

When creating methods, you should avoid causing a situation in which a portion of code 

cannot, under any circumstances, be executed. This is called 

unreachable code,

 and it is 

considered incorrect in C#. The compiler will issue a warning message if you create a 

method that contains unreachable code. For example:

public void MyMeth() {

  char a, b;

  // ...

  if(a==b) {

    Console.WriteLine("equal");

    return;

  } else {

    Console.WriteLine("not equal");

    return;

  }

  Console.WriteLine("this is unreachable");

}

Here, the method 

MyMeth( )

 will always return before the final 

WriteLine( )

 statement is 

executed. If you try to compile this method, you will receive a warning. In general, unreachable 

code constitutes a mistake on your part, so it is a good idea to take unreachable code 

warnings seriously.

Constructors

In the preceding examples, the instance variables of each 

Building

 object had to be set 

manually using a sequence of statements, such as

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