<PackageReference Include="Azure.Storage.Blobs" Version="12.31.0-beta.1" />

Azure.Storage.Blobs.Models.BlobAccessPolicy

public DateTimeOffset ExpiresOn { get; set; }

public string Permissions { get; set; }

public DateTimeOffset? PolicyExpiresOn { get; set; }

public DateTimeOffset? PolicyStartsOn { get; set; }

public DateTimeOffset StartsOn { get; set; }