到这里下载:http://www.microsoft.com/downloads/details.aspx?FamilyID=262d25e3-f589-4842-8157-034d1e7cf3a3&DisplayLang=zh-cn这里有更多的下载:http://www.microsoft.com/downloads/results.aspx?pocId=&freetext=.NET%20Framework%20&DisplayLang=zh-cn