http://www.codeproject.com
http://www.c-sharpcorner.com
http://windowsforms.net/Default.aspx?tabindex=3&tabid=40
http://www.syncfusion.com/FAQ/WinForms/

http://www.dapha.net/down/show.asp?classid=2

常用的：
http://www.csharphelp.com
http://www.csharp-corner.com
http://www.gotdotnet.com
http://www.aspxcn.net
http://www.csharptoday.com
http://www.asptoday.com
http://www.dotnet247.com
http://www.xmlwebservices.cc/index_Samples.htm
http://www.syncfusion.com/FAQ/WinForms/FAQ_c44c.asp#Top
http://www.aspxapp.com
http://210.22.94.211/
http://www.dnzone.com/ShowDetail.asp?NewsId=48
http://www.aspcool.com
http://www.driverdevelop.com
http://www.china-askpro.com
http://www.yzcs.net
http://www.4046.com/nnsrc
http://www.aspxcn.com/dotnetdown/default.aspx?classid=2&subclass=30
ftp://asp@211.154.60.72/book/by ahjyjlfq/asp.net编程精彩百例.rar
www.wenhui.org
http://www.china-code.net/list.asp?id=3656
http://www.uncj.net
http://www.codeproject.com/aspnet/datagriddemo.asp?target=datagrid%7Cdr

http://www.uncj.net 这个就够了，好好看看、

http://windowsforms.net

http://www.dotnetjunkies.com/Tutorial/ShowContent.aspx?cg=65DC168F-B2AD-408B-8AA0-AD90DD739317&ForumID=4258#rating
http://www.aspxcn.com/dotnetdown/default.aspx?classid=1&subclass=6
http://www.uncj.net
http://www.syncfusion.com
http://www.codestudy.net/
http://www.51dotnet.com
csource.yeah.net
http://www.china-pub.com
http://lzhm.net
http://www.aspalliance.com
http://www.cshrp.net
http://www.stardeveloper.com
http://www.codeproject.com/
http://www.ondotnet.com
http://www.15seconds.com
http://chs.gotdotnet.com/quickstart/aspplus/
http://www.microsoft.com/china/msdn/catalog/windows/

http://sourceforge.net/

http://www.codeproject.com
http://www.c-sharpcorner.com
http://windowsforms.net/Default.aspx?tabindex=3&tabid=40
http://www.syncfusion.com/FAQ/WinForms/
http://www.51dotnet.com
太多了 自己找一下 会发现到更好的

既然这东西是外国人比较强，所以外国网站更新的比较快，你就硬着头皮看吧，不是很难的，又不是文学。www.codeproject.com比较好。分类明确，难以适中。适合各个人群

http://www.pda2008.net/bbs2001/list.asp?boardid=36
http://www.palmheart.net/index.php?name=PNphpBB2&file=viewforum&f=29
http://digi.pchome.net/bbs5.htm
http://www.echoice.com.cn/bbs/index.asp?luntan=12

http://jztele.com/~coldice/book/net/
里面有很多有用的c#书,书中自然有很多的例子了.