简单上传按照官网上示例加了md5校验一直提示SignatureDoesNotMatch，去掉就可以了

[wppeng520]

using (var fs = File.Open(localFilename, FileMode.Open))
{
md5 = OssUtils.ComputeContentMd5(fs, fs.Length);
}
var objectMeta = new ObjectMetadata
{
ContentMd5 = md5
};