LinkedResource using a Stream instead of a file path on disc

MemoryStreamResourceProvider.cs

public class StreamResourceProvider : LinkedResourceProvider{
  /// <summary>
  /// Gets a linked resource given its Id and FilePath
  /// </summary>
  public override LinkedResource Get(string contentId, string filePath){
    var stream = GetYourStream(contentId, filePath);
    return new LinkedResource(stream);    
  }
  
  private Stream GetYourStream(contentId, filePath){
    //initialize the stream based on your custom logic
  }
}

public class YourMailer : MailerBase{

  public YourMailer(){
    //Use the StreamResourceProvider for your mailer
    this.LinkedResourceProvider = new StreamResourceProvider();
  }

}