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public class AccessManageModel
{
    private CosXml cosXml; //将服务用户设置成数据成员
    // 初始化COS服务实例
    private void InitCosXml()
    {
        string region = Environment.GetEnvironmentVariable("COS_REGION");
        CosXmlConfig config = new CosXmlConfig.Builder()
            .SetRegion(region) // 设置默认的地域, COS 地域的简称请参照 https://cloud.tencent.com/document/product/436/6224
            .Build();
        string secretId = Environment.GetEnvironmentVariable("SECRET_ID"); // 云 API 密钥 SecretId, 获取 API 密钥请参照 https://console.cloud.tencent.com/cam/capi
        string secretKey = Environment.GetEnvironmentVariable("SECRET_KEY"); // 云 API 密钥 SecretKey, 获取 API 密钥请参照 https://console.cloud.tencent.com/cam/capi
        long durationSecond = 600; //每次请求签名有效时长，单位为秒
        QCloudCredentialProvider qCloudCredentialProvider = new DefaultQCloudCredentialProvider(secretId, secretKey, durationSecond);
        this.cosXml = new CosXmlServer(config, qCloudCredentialProvider);
    }
}

public void PutBucketAcl()
{
    try
    {
        // 存储桶名称，此处填入格式必须为 bucketname-APPID, 其中 APPID 获取参考 https://console.cloud.tencent.com/developer
        string bucket = "examplebucket-1250000000";
        PutBucketACLRequest request = new PutBucketACLRequest(bucket);
        //设置私有读写权限
        request.SetCosACL(CosACL.Private);
        //授予113197593账号读权限
        COSXML.Model.Tag.GrantAccount readAccount = new COSXML.Model.Tag.GrantAccount();
        readAccount.AddGrantAccount("113197593", "113197593");
        request.SetXCosGrantRead(readAccount);
        //执行请求
        PutBucketACLResult result = cosXml.PutBucketACL(request);
        //请求成功
        Console.WriteLine(result.GetResultInfo());
    }
    catch (COSXML.CosException.CosClientException clientEx)
    {
        Console.WriteLine("CosClientException: " + clientEx);
    }
    catch (COSXML.CosException.CosServerException serverEx)
    {
        Console.WriteLine("CosServerException: " + serverEx.GetInfo());
    }
}

public void GetBucketAcl()
{
    try
    {
        // 存储桶名称，此处填入格式必须为 bucketname-APPID, 其中 APPID 获取参考 https://console.cloud.tencent.com/developer
        string bucket = "examplebucket-1250000000";
        GetBucketACLRequest request = new GetBucketACLRequest(bucket);
        //执行请求
        GetBucketACLResult result = cosXml.GetBucketACL(request);
        //存储桶的 ACL 信息
        AccessControlPolicy acl = result.accessControlPolicy;
        Console.WriteLine(result.GetResultInfo());
    }
    catch (COSXML.CosException.CosClientException clientEx)
    {
        Console.WriteLine("CosClientException: " + clientEx);
    }
    catch (COSXML.CosException.CosServerException serverEx)
    {
        Console.WriteLine("CosServerException: " + serverEx.GetInfo());
    }
}

public void PutObjectAcl()
{
    // 因为存储桶 ACL 最多1000条，为避免 ACL 达到上限，非必须情况不建议给对象单独设置 ACL(对象默认继承 bucket 权限).
    try
    {
        // 存储桶名称，此处填入格式必须为 bucketname-APPID, 其中 APPID 获取参考 https://console.cloud.tencent.com/developer
        string bucket = "examplebucket-1250000000";
        string key = "exampleobject"; //对象键
        PutObjectACLRequest request = new PutObjectACLRequest(bucket, key);
        //设置私有读写权限 
        request.SetCosACL(CosACL.Private);
        //授予1131975903账号读权限 
        COSXML.Model.Tag.GrantAccount readAccount = new COSXML.Model.Tag.GrantAccount();
        readAccount.AddGrantAccount("1131975903", "1131975903");
        request.SetXCosGrantRead(readAccount);
        //执行请求
        PutObjectACLResult result = cosXml.PutObjectACL(request);
        //请求成功
        Console.WriteLine(result.GetResultInfo());
    }
    catch (COSXML.CosException.CosClientException clientEx)
    {
        Console.WriteLine("CosClientException: " + clientEx);
    }
    catch (COSXML.CosException.CosServerException serverEx)
    {
        Console.WriteLine("CosServerException: " + serverEx.GetInfo());
    }
}

public void GetObjectAcl()
{
    try
    {
        // 存储桶名称，此处填入格式必须为 bucketname-APPID, 其中 APPID 获取参考 https://console.cloud.tencent.com/developer
        string bucket = "examplebucket-1250000000";
        string key = "exampleobject"; //对象键
        GetObjectACLRequest request = new GetObjectACLRequest(bucket, key);
        //执行请求
        GetObjectACLResult result = cosXml.GetObjectACL(request);
        //对象的 ACL 信息
        AccessControlPolicy acl = result.accessControlPolicy;
        Console.WriteLine(result.GetResultInfo());
    }
    catch (COSXML.CosException.CosClientException clientEx)
    {
        Console.WriteLine("CosClientException: " + clientEx);
    }
    catch (COSXML.CosException.CosServerException serverEx)
    {
        Console.WriteLine("CosServerException: " + serverEx.GetInfo());
    }
}