如何使用.net sdk设置bucket的默认服务端加密？

using COSXML;
using COSXML.Auth;
using COSXML.Model.Bucket;

COSXMLConfig config = new COSXMLConfig.Builder()
    .SetConnectionTimeoutMs(60000)  // 设置连接超时时间，单位毫秒，默认45000ms
    .SetReadWriteTimeoutMs(40000)   // 设置读写超时时间，单位毫秒，默认45000ms
    .IsHttps(true)                  // 设置默认 HTTPS 请求
    .SetAppid("YourAppid")          // 设置腾讯云账号的 Appid
    .SetRegion("YourRegion")        // 设置存储桶所在的地域
    .SetDebugLog(true)              // 是否开启调试日志，默认关闭
    .Build();

// 设置腾讯云 API 密钥
string secretId = "YourSecretId";
string secretKey = "YourSecretKey";
long durationSecond = 600;  // 密钥有效期，单位秒
QCloudCredentialProvider cosCredentialProvider = new DefaultQCloudCredentialProvider(secretId, secretKey, durationSecond);

COSXMLServerConfig serverConfig = new COSXMLServerConfig();
serverConfig.IsDefaultServerSideEncryption = true;  // 开启默认服务端加密
serverConfig.DefaultServerSideEncryptionAlgorithm = "AES256";  // 设置默认加密算法为 AES256

CosXmlServer cosXml = new CosXmlServer(config, cosCredentialProvider, serverConfig);

string bucket = "YourBucket";
SetBucketEncryptionRequest request = new SetBucketEncryptionRequest(bucket);
request.SetServerSideEncryptionConfiguration("AES256");  // 设置加密算法为 AES256

SetBucketEncryptionResult result = cosXml.SetBucketEncryption(request);