请问有.net的API或示例吗？

目前还不提供吧。看下官网api sdk下载部分。。

我也要.net 的版SDK

验证码计算方法如下：
  "Authorization: OSS " + AccessId + ":" + base64(hmac-sha1(VERB + "\n"
                                         + CONTENT-MD5 + "\n"
                                         + CONTENT-TYPE + "\n"
                                         + DATE + "\n"                                    
+ CanonicalizedOSSHeaders
+ CanonicalizedResource))

假如发出的请求是：

PUT /quotes/nelson HTTP/1.0
Content-Md5: c8fdb181845a4ca6b8fec737b3581d76
Content-Type: text/html
Date: Thu, 17 Nov 2005 18:49:58 GMT
X-OSS-Meta-Author: foo@bar.com
X-OSS-Magic: abracadabra

AccessID 是： "44CF9590006BF252F707"
AccessKey 是 "OtxrzxIsfpFjA7SwPzILwy8Bw21TLhquhboDYROV"，


VERB＝PUT
CONTENT-MD5＝c8fdb181845a4ca6b8fec737b3581d76
CONTENT-TYPE＝text/html
DATE ＝　Thu, 17 Nov 2005 18:49:58 GMT
CanonicalizedOSSHeaders=x-oss-magic:abracadabra\nx-oss-meta-author:foo@bar.com
CanonicalizedResource=/quotes/nelson

签名的字符串就是：
PUT\nc8fdb181845a4ca6b8fec737b3581d76\ntext/html\nThu, 17 Nov 2005
18:49:58 GMT\nx-oss-magic:abracadabra\nx-oss-meta-author:foo@bar.com\n/quotes/nelson

得到的签名应该是：
63mwfl+zYIOG6k95yxbgMruQ6QI=

在Ｈeader中就是：
Authorization: OSS 44CF9590006BF252F707: 63mwfl+zYIOG6k95yxbgMruQ6QI=

我也和楼主一样照着写了个，也是提示403错误。。。
Url方式签名返回XML提示：SignatureDoesNotMatch，就是不知签名错在哪里。
楼主搞定了吗?求.NET 版SDK