C# Essentials
by Ben Albahari, Peter Drayton & Brad Merrill


This errata page lists errors outstanding in the most recent printing.

If you have any error reports or technical questions, you can send them to
booktech@oreilly.com.  (Please specify the printing date of your copy.)


This page was last updated on June 14, 2001.


Here's a key to the markup:

        [page-number]: serious technical mistake
        {page-number}: minor technical mistake
        <page-number>: important language/formatting problem
        (page-number): language change or minor formatting problem
        ?page-number?: reader question or request for clarification


CONFIRMED errors:


{5} last paragraph:
The first sentence claims that to compile Test.cs one should run "cs Test.cs".
The compiler is csc, not cs, so this text should be "csc Test.cs".


(9) bottom of page; there is an unnecessary space before "int"


(12) bool type, last sentence: 
s/a array/an array/


(18) definite assignment: 
The ast sentence reads, "a warning is generated if the line v = a is commented
out". This is true, but it is not because a default value is assigned to a 
field that was never explicitly assigned. The warning is because the field is 
never used. We should remove this last sentence.


(22) 2nd paragraph, 2nd-to-last sentence: 
s of statement font is different.


{25} do-while loops syntax: 
s/statement o -statement-block/statement-or-statement-block/


{25} while loops syntax: 
s/statement or statement-block/statement-or-statement-block/ (Also make sure 
this is all in italics; the or currently isn't.)


(35) 1st sentence: 
s/base class must explicitly/base class should explicitly/


{35} replace code fragment:

	public class Base { // written by the library people
         public virtual void Foo() {...} // added in latest update
     	}
        public class Derived : Base { // written by you
         public void Foo() {...} // not intended as an override
        }


(38) first paragraph; The first sentence should read: "Includes fields, 
constants, and events.


(38) Differences between Classes and Structs: 
Words for first bullet s/structs typically simple types, whereas value-type 
semantics/structs are typically simple types were value semantics/


(39) last paragraph:
s/A read-only field is always evaluated/Assignment to a read-only field is 
always evaluated/

s/To compile, a nonread-only field/To compile, a read-only field/


{41} properties syntax: 
The [ before virtual is in italics. Also, the last "attributes? set 
statement-block" line should not have a | on the end of it.


{46} Operators: 
missing ==, please add.


{57} s/type [*]+ /type[*]+ array-name /. array-name should be in italics.


{60} code fragment: 
s/Toggle tog = (Switch)Enum.FromString/Toggle tog = (Toggle)Enum.FromString/


{74} The #define statement is effectively equivalent to #define true (drop the
=).


(86) 3rd paragraph:
The last sentence reads:
  
	(see the laster section "Strings").

It should read:
  
	(see the latter section "Strings").


(95) last sentence: 
s/returns if/returns false if/


(109) s/First, execution may leave the lock statement blocked/First, execution
may leave the scope of the lock statement block


(127) bullet 4: 
s/attribute, may/attribute may/


(131) 3rd paragraph, last sentence: 
s/object/objects/


{139} code fragment: 
This no longer compiles because Microsoft updated MSN Instant Messenger - 
replace with this code frag:

	// SetFN.cs - compile with /r:Messenger.dll
	// Run SetFN.exe <Name> to set the FriendlyName   for
	//   the currently logged-in user
	// Run TlbImp.exe "C:\Program Files\Messenger\msmsgs.exe"
	//   to create Messenger.dll
	using Messenger; // COM API for MSN Instant Messenger
	public class MyApp {
	 public static void Main(string[] args) {
	    MsgrObject mo = new MsgrObject();
	    IMsgrService im = mo.Services.PrimaryService;
	    im.FriendlyName = args[0];
	    }
	}

Also, update the leadin sentence as follows: s/example demonstrates adding a 
contact to MSN/example demonstrates changing the friendly name of the user 
with MSN/.


(142) 1st sentence: 
s/to one/to use one/


(144) s/ILAsm.exe/ILDasm.exe/


(144) s/see the String namespace/see the String class/


(146) s/System. Activator/System.Activator/


(161) for definition: 
s/stopping-condition/continuation-condition/


(163) return definition: 
s/nonvoid/non-void/


(163) sealed definition: 
s/derived-from/derived from/