Object Storage Service:Copy objects (C# SDK V2)

using OSS = AlibabaCloud.OSS.V2;  // Create an alias for Alibaba Cloud OSS SDK to simplify subsequent use

var region = "cn-hangzhou";  // Required. Specify the region of the bucket. In this example, the region is China (Hangzhou), and the region ID is cn-hangzhou
var endpoint = null as string;  // Optional. Specify the endpoint used to access OSS. In this example, the endpoint for China (Hangzhou) is https://oss-cn-hangzhou.aliyuncs.com
var srcBucket = "your srcBucket name";  // Required. Specify the name of the source bucket
var srcKey = "your srcKey name";  // Required. Specify the name of the object in the source bucket in the folder/objectName format
var dstBucket = "your dstBucket name";  // Required. Specify the name of the destination bucket
var dstKey = "your dstkey name";  // Required. Specify the name of the object in the destination bucket in the folder/objectName format

// Load the default configuration of the OSS SDK, which automatically reads credential information (such as AccessKey) from environment variables
var cfg = OSS.Configuration.LoadDefault();
// Explicitly set to use environment variables for credentials authentication (format: OSS_ACCESS_KEY_ID, OSS_ACCESS_KEY_SECRET)
cfg.CredentialsProvider = new OSS.Credentials.EnvironmentVariableCredentialsProvider();
// Set the bucket region in the configuration
cfg.Region = region;   
// If an endpoint is specified, override the default endpoint
if(endpoint != null)
{
    cfg.Endpoint = endpoint;
} 

// Create an OSS client instance using the configuration information
using var client = new OSS.Client(cfg); 

// Call the CopyObjectAsync method to perform the OSS object copy operation
var result = await client.CopyObjectAsync(new OSS.Models.CopyObjectRequest()
{
    Bucket = dstBucket,
    Key = dstKey,
    SourceBucket = srcBucket,
    SourceKey = srcKey
});

// Display the upload result
Console.WriteLine("CopyObject done");  // Indicate that the operation is complete
Console.WriteLine($"StatusCode: {result.StatusCode}");  // HTTP status code
Console.WriteLine($"RequestId: {result.RequestId}");  // RequestId, used for troubleshooting by Alibaba Cloud
Console.WriteLine("Response Headers:");  // Response header information
result.Headers.ToList().ForEach(x => Console.WriteLine(x.Key + " : " + x.Value));  // Traverse and print all response headers