diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index b2863d0..98c4869 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -1,4 +1,4 @@
-*eval.txt*	For Vim version 9.0.  Last change: 2022 Dec 03
+*eval.txt*	For Vim version 9.0.  Last change: 2022 Dec 11
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -163,9 +163,10 @@
 A List, Dictionary or Float is not a Number or String, thus evaluate to FALSE.
 
 		*E611* *E745* *E728* *E703* *E729* *E730* *E731* *E908* *E910*
-		*E913* *E974* *E975* *E976*
-|List|, |Dictionary|, |Funcref|, |Job|, |Channel| and |Blob| types are not
-automatically converted.
+		*E913* *E974* *E975* *E976* *E1319* *E1320* *E1321* *E1322*
+		*E1323* *E1324*
+|List|, |Dictionary|, |Funcref|, |Job|, |Channel|, |Blob|, |Class| and
+|object| types are not automatically converted.
 
 							*E805* *E806* *E808*
 When mixing Number and Float the Number is converted to Float.  Otherwise
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 73409b7..e95f63f 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1,4 +1,4 @@
-*options.txt*	For Vim version 9.0.  Last change: 2022 Nov 30
+*options.txt*	For Vim version 9.0.  Last change: 2022 Dec 09
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -7117,45 +7117,49 @@
 	messages, for example  with CTRL-G, and to avoid some other messages.
 	It is a list of flags:
 	 flag	meaning when present	~
-	  f	use "(3 of 5)" instead of "(file 3 of 5)"
-	  i	use "[noeol]" instead of "[Incomplete last line]"
-	  l	use "999L, 888B" instead of "999 lines, 888 bytes"
-	  m	use "[+]" instead of "[Modified]"
-	  n	use "[New]" instead of "[New File]"
-	  r	use "[RO]" instead of "[readonly]"
-	  w	use "[w]" instead of "written" for file write message
+	  f	use "(3 of 5)" instead of "(file 3 of 5)"		*shm-f*
+	  i	use "[noeol]" instead of "[Incomplete last line]"	*shm-i*
+	  l	use "999L, 888B" instead of "999 lines, 888 bytes"	*shm-l*
+	  m	use "[+]" instead of "[Modified]"			*shm-m*
+	  n	use "[New]" instead of "[New File]"			*shm-n*
+	  r	use "[RO]" instead of "[readonly]"			*shm-r*
+	  w	use "[w]" instead of "written" for file write message	*shm-w*
 		and "[a]" instead of "appended" for ':w >> file' command
-	  x	use "[dos]" instead of "[dos format]", "[unix]" instead of
-		"[unix format]" and "[mac]" instead of "[mac format]".
-	  a	all of the above abbreviations
+	  x	use "[dos]" instead of "[dos format]", "[unix]"		*shm-x*
+		instead of "[unix format]" and "[mac]" instead of "[mac
+		format]".
+	  a	all of the above abbreviations				*shm-a*
 
-	  o	overwrite message for writing a file with subsequent message
-		for reading a file (useful for ":wn" or when 'autowrite' on)
-	  O	message for reading a file overwrites any previous message.
-		Also for quickfix message (e.g., ":cn").
-	  s	don't give "search hit BOTTOM, continuing at TOP" or "search
-		hit TOP, continuing at BOTTOM" messages; when using the search
-		count do not show "W" after the count message (see S below)
-	  t	truncate file message at the start if it is too long to fit
-		on the command-line, "<" will appear in the left most column.
-		Ignored in Ex mode.
-	  T	truncate other messages in the middle if they are too long to
-		fit on the command line.  "..." will appear in the middle.
-		Ignored in Ex mode.
-	  W	don't give "written" or "[w]" when writing a file
-	  A	don't give the "ATTENTION" message when an existing swap file
-		is found.
-	  I	don't give the intro message when starting Vim |:intro|.
-	  c	don't give |ins-completion-menu| messages.  For example,
-		"-- XXX completion (YYY)", "match 1 of 2", "The only match",
-		"Pattern not found", "Back at original", etc.
-	  C	don't give messages while scanning for ins-completion items,
-		for instance "scanning tags"
-	  q	use "recording" instead of "recording @a"
-	  F	don't give the file info when editing a file, like `:silent`
-		was used for the command; note that this also affects messages
-		from autocommands
-	  S     do not show search count message when searching, e.g.
+	  o	overwrite message for writing a file with subsequent	*shm-o*
+		message for reading a file (useful for ":wn" or when
+		'autowrite' on)
+	  O	message for reading a file overwrites any previous	*smh-O*
+		message.  Also for quickfix message (e.g., ":cn").
+	  s	don't give "search hit BOTTOM, continuing at TOP" or	*shm-s*
+		"search hit TOP, continuing at BOTTOM" messages; when using
+		the search count do not show "W" after the count message (see
+		S below)
+	  t	truncate file message at the start if it is too long	*shm-t*
+		to fit on the command-line, "<" will appear in the left most
+		column.  Ignored in Ex mode.
+	  T	truncate other messages in the middle if they are too	*shm-T*
+		long to fit on the command line.  "..." will appear in the
+		middle.  Ignored in Ex mode.
+	  W	don't give "written" or "[w]" when writing a file	*shm-W*
+	  A	don't give the "ATTENTION" message when an existing	*shm-A*
+		swap file is found.
+	  I	don't give the intro message when starting Vim,		*shm-I*
+	  	see |:intro|.
+	  c	don't give |ins-completion-menu| messages.  For		*shm-c*
+		example, "-- XXX completion (YYY)", "match 1 of 2", "The only
+		match", "Pattern not found", "Back at original", etc.
+	  C	don't give messages while scanning for ins-completion	*shm-C*
+		items, for instance "scanning tags"
+	  q	use "recording" instead of "recording @a"		*shm-q*
+	  F	don't give the file info when editing a file, like	*shm-F*
+		`:silent` was used for the command; note that this also
+		affects messages from autocommands
+	  S     do not show search count message when searching, e.g.	*shm-S*
 	        "[1/5]"
 
 	This gives you the opportunity to avoid that a change between buffers
diff --git a/runtime/doc/quickfix.txt b/runtime/doc/quickfix.txt
index 032e9a7..7dc4fa3 100644
--- a/runtime/doc/quickfix.txt
+++ b/runtime/doc/quickfix.txt
@@ -1273,6 +1273,21 @@
 For writing a compiler plugin, see |write-compiler-plugin|.
 
 
+DOTNET							*compiler-dotnet*
+
+The .NET CLI compiler outputs both errors and warnings by default. The output
+may be limited to include only errors, by setting the g:dotnet_errors_only
+variable to |v:true|.
+
+The associated project name is included in each error and warning. To supress
+the project name, set the g:dotnet_show_project_file variable to |v:false|.
+
+Example: limit output to only display errors, and suppress the project name: >
+	let dotnet_errors_only = v:true
+	let dotnet_show_project_file = v:false
+	compiler dotnet
+<
+
 GCC					*quickfix-gcc*	*compiler-gcc*
 
 There's one variable you can set for the GCC compiler:
diff --git a/runtime/doc/tags b/runtime/doc/tags
index 2fe27d4..9178c77 100644
--- a/runtime/doc/tags
+++ b/runtime/doc/tags
@@ -3988,6 +3988,7 @@
 Channel	eval.txt	/*Channel*
 Channels	eval.txt	/*Channels*
 Chinese	mbyte.txt	/*Chinese*
+Class	vim9class.txt	/*Class*
 Cmd-event	autocmd.txt	/*Cmd-event*
 CmdUndefined	autocmd.txt	/*CmdUndefined*
 Cmdline	cmdline.txt	/*Cmdline*
@@ -4368,7 +4369,20 @@
 E1312	windows.txt	/*E1312*
 E1313	eval.txt	/*E1313*
 E1314	vim9class.txt	/*E1314*
+E1315	vim9class.txt	/*E1315*
+E1316	vim9class.txt	/*E1316*
+E1317	vim9class.txt	/*E1317*
+E1318	vim9class.txt	/*E1318*
+E1319	eval.txt	/*E1319*
 E132	userfunc.txt	/*E132*
+E1320	eval.txt	/*E1320*
+E1321	eval.txt	/*E1321*
+E1322	eval.txt	/*E1322*
+E1323	eval.txt	/*E1323*
+E1324	eval.txt	/*E1324*
+E1325	vim9class.txt	/*E1325*
+E1326	vim9class.txt	/*E1326*
+E1327	vim9class.txt	/*E1327*
 E133	userfunc.txt	/*E133*
 E134	change.txt	/*E134*
 E135	autocmd.txt	/*E135*
@@ -5427,6 +5441,7 @@
 OS390-has-ebcdic	os_390.txt	/*OS390-has-ebcdic*
 OS390-limitations	os_390.txt	/*OS390-limitations*
 OS390-open-source	os_390.txt	/*OS390-open-source*
+Object	vim9class.txt	/*Object*
 OffTheSpot	mbyte.txt	/*OffTheSpot*
 OnTheSpot	mbyte.txt	/*OnTheSpot*
 Operator-pending	intro.txt	/*Operator-pending*
@@ -6264,6 +6279,7 @@
 cino-{	indent.txt	/*cino-{*
 cino-}	indent.txt	/*cino-}*
 cinoptions-values	indent.txt	/*cinoptions-values*
+class	vim9class.txt	/*class*
 class-member	vim9class.txt	/*class-member*
 class-method	vim9class.txt	/*class-method*
 clear-undo	undo.txt	/*clear-undo*
@@ -6322,6 +6338,7 @@
 compile-changes-9	version9.txt	/*compile-changes-9*
 compiler-compaqada	ft_ada.txt	/*compiler-compaqada*
 compiler-decada	ft_ada.txt	/*compiler-decada*
+compiler-dotnet	quickfix.txt	/*compiler-dotnet*
 compiler-gcc	quickfix.txt	/*compiler-gcc*
 compiler-gnat	ft_ada.txt	/*compiler-gnat*
 compiler-hpada	ft_ada.txt	/*compiler-hpada*
@@ -8878,6 +8895,14 @@
 nroff.vim	syntax.txt	/*nroff.vim*
 null	vim9.txt	/*null*
 null-variable	eval.txt	/*null-variable*
+null_blob	vim9.txt	/*null_blob*
+null_channel	vim9.txt	/*null_channel*
+null_dict	vim9.txt	/*null_dict*
+null_function	vim9.txt	/*null_function*
+null_job	vim9.txt	/*null_job*
+null_list	vim9.txt	/*null_list*
+null_partial	vim9.txt	/*null_partial*
+null_string	vim9.txt	/*null_string*
 number_relativenumber	options.txt	/*number_relativenumber*
 numbered-function	eval.txt	/*numbered-function*
 numbermax-variable	eval.txt	/*numbermax-variable*
@@ -8887,6 +8912,7 @@
 o_CTRL-V	motion.txt	/*o_CTRL-V*
 o_V	motion.txt	/*o_V*
 o_v	motion.txt	/*o_v*
+object	vim9class.txt	/*object*
 object-motions	motion.txt	/*object-motions*
 object-select	motion.txt	/*object-select*
 objects	index.txt	/*objects*
@@ -9545,6 +9571,27 @@
 shift	intro.txt	/*shift*
 shift-left-right	change.txt	/*shift-left-right*
 shiftwidth()	builtin.txt	/*shiftwidth()*
+shm-A	options.txt	/*shm-A*
+shm-C	options.txt	/*shm-C*
+shm-F	options.txt	/*shm-F*
+shm-I	options.txt	/*shm-I*
+shm-S	options.txt	/*shm-S*
+shm-T	options.txt	/*shm-T*
+shm-W	options.txt	/*shm-W*
+shm-a	options.txt	/*shm-a*
+shm-c	options.txt	/*shm-c*
+shm-f	options.txt	/*shm-f*
+shm-i	options.txt	/*shm-i*
+shm-l	options.txt	/*shm-l*
+shm-m	options.txt	/*shm-m*
+shm-n	options.txt	/*shm-n*
+shm-o	options.txt	/*shm-o*
+shm-q	options.txt	/*shm-q*
+shm-r	options.txt	/*shm-r*
+shm-s	options.txt	/*shm-s*
+shm-t	options.txt	/*shm-t*
+shm-w	options.txt	/*shm-w*
+shm-x	options.txt	/*shm-x*
 short-name-changed	version4.txt	/*short-name-changed*
 showing-menus	gui.txt	/*showing-menus*
 sign-column	sign.txt	/*sign-column*
@@ -9583,6 +9630,7 @@
 slow-fast-terminal	term.txt	/*slow-fast-terminal*
 slow-start	starting.txt	/*slow-start*
 slow-terminal	term.txt	/*slow-terminal*
+smh-O	options.txt	/*smh-O*
 socket-interface	channel.txt	/*socket-interface*
 sort()	builtin.txt	/*sort()*
 sorting	change.txt	/*sorting*
diff --git a/runtime/doc/todo.txt b/runtime/doc/todo.txt
index 39961a1..4474632 100644
--- a/runtime/doc/todo.txt
+++ b/runtime/doc/todo.txt
@@ -1,4 +1,4 @@
-*todo.txt*      For Vim version 9.0.  Last change: 2022 Dec 05
+*todo.txt*      For Vim version 9.0.  Last change: 2022 Dec 11
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -54,6 +54,14 @@
 
 Further Vim9 improvements, possibly after launch:
 - implement :class and :interface: See |vim9-classes|  #11544
+    make default constructor use "this.member = void"
+    make public / default read access / private work for members.
+    string value of class and object in echo_string_core()
+    object empty(), len() - can class define a method?
+    tv_equal() should compare values, not identity.
+    garbage collection: set_ref_in_item(): Mark items in class as used ?
+    type() should return different type for each class?
+    how about lock/unlock?
 - implement :type
 - implement :enum
 - Use Vim9 for more runtime files.
diff --git a/runtime/doc/vim9.txt b/runtime/doc/vim9.txt
index a70b8a4..e13feee 100644
--- a/runtime/doc/vim9.txt
+++ b/runtime/doc/vim9.txt
@@ -1,4 +1,4 @@
-*vim9.txt*	For Vim version 9.0.  Last change: 2022 Dec 03
+*vim9.txt*	For Vim version 9.0.  Last change: 2022 Dec 08
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -1023,7 +1023,9 @@
 
 Simple types are Number, Float, Special and Bool.  For other types |string()|
 should be used.
-						*false* *true* *null* *E1034*
+			*false* *true* *null* *null_blob* *null_channel*
+			*null_dict* *null_function* *null_job* *null_list*
+			*null_partial* *null_string* *E1034*
 In Vim9 script one can use the following predefined values: >
 	true
 	false
diff --git a/runtime/doc/vim9class.txt b/runtime/doc/vim9class.txt
index b018a10..7785fbe 100644
--- a/runtime/doc/vim9class.txt
+++ b/runtime/doc/vim9class.txt
@@ -1,4 +1,4 @@
-*vim9class.txt*	For Vim version 9.0.  Last change: 2022 Dec 04
+*vim9class.txt*	For Vim version 9.0.  Last change: 2022 Dec 11
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -96,7 +96,7 @@
 	      this.col = col
 	   enddef
 	 endclass
-
+<							*object* *Object*
 You can create an object from this class with the new() method: >
 
 	var pos = TextPosition.new(1, 1)
@@ -104,7 +104,7 @@
 The object members "lnum" and "col" can be accessed directly: >
 
 	echo $'The text position is ({pos.lnum}, {pos.col})'
-
+<							*E1317* *E1327*
 If you have been using other object-oriented languages you will notice that
 in Vim the object members are consistently referred to with the "this."
 prefix.  This is different from languages like Java and TypeScript.  This
@@ -329,14 +329,14 @@
 
 ==============================================================================
 
-5.  More class details					*Vim9-class*
+5.  More class details				*Vim9-class* *Class* *class*
 
 Defining a class ~
 					*:class* *:endclass* *:abstract*
 A class is defined between `:class` and `:endclass`.  The whole class is
 defined in one script file.  It is not possible to add to a class later.
 
-A class can only be defined in a |Vim9| script file.  *E1315*
+A class can only be defined in a |Vim9| script file.  *E1316*
 A class cannot be defined inside a function.
 
 It is possible to define more than one class in a script file.  Although it
@@ -361,7 +361,7 @@
 							*E1314*
 The class name should be CamelCased.  It must start with an uppercase letter.
 That avoids clashing with builtin types.
-
+							*E1315*
 After the class name these optional items can be used.  Each can appear only
 once.  They can appear in any order, although this order is recommended: >
 	extends ClassName
@@ -377,6 +377,20 @@
 interface, which is often done in many languages, especially Java.
 
 
+Items in a class ~
+						*E1318* *E1325* *E1326*
+Inside a class, in betweeen `:class` and `:endclass`, these items can appear:
+- An object member declaration: >
+  	this._memberName: memberType
+  	this.memberName: memberType
+	public this.memberName: memberType
+- A constructor method: >
+  	def new(arguments)
+  	def newName(arguments)
+- An object method: >
+  	def SomeMethod(arguments)
+
+
 Defining an interface ~
 						*:interface* *:endinterface*
 An interface is defined between `:interface` and `:endinterface`.  It may be
@@ -417,11 +431,28 @@
 
 Then The default constructor will be: >
 
-	def new(this.name, this.age, this.gender)
+	def new(this.name = void, this.age = void, this.gender = void)
 	enddef
 
 All object members will be used, also private access ones.
 
+The "= void" default values make the arguments optional.  Thus you can also
+call `new()` without any arguments.  Since "void" isn't an actual value, no
+assignment will happen and the default value for the object members will be
+used.  This is a more useful example, with default values: >
+
+	class TextPosition
+	   this.lnum: number = 1
+	   this.col: number = 1
+	endclass
+
+If you want the constructor to have mandatory arguments, you need to write it
+yourself.  For example, if for the AutoNew class above you insist on getting
+the name, you can define the constructor like this: >
+
+	def new(this.name, this.age = void, this.gender = void)
+	enddef
+
 
 Multiple constructors ~