<PackageReference Include="Azure.Storage.Files.DataLake" Version="12.27.1" />

Azure.Storage.Files.DataLake.Models.DataLakeFileAppendOptions

public class DataLakeFileAppendOptions
public byte[] ContentHash { get; set; }

public bool? Flush { get; set; }

public DataLakeLeaseAction? LeaseAction { get; set; }

public TimeSpan? LeaseDuration { get; set; }

public string LeaseId { get; set; }

public IProgress<long> ProgressHandler { get; set; }

public string ProposedLeaseId { get; set; }

public UploadTransferValidationOptions TransferValidation { get; set; }

public DataLakeFileAppendOptions()