Создание письма с прикрепленным файлом в бизнес-процессе

		public static bool SendMail(string mailto, string caption, string message, Guid FileId, string SchemaName, UserConnection userConn) {
			SchemaName+="File";
			string smtpServer = Terrasoft.Core.Configuration.SysSettings.GetValue(userConn, "SFsmtpServer").ToString();
			string from = Terrasoft.Core.Configuration.SysSettings.GetValue(userConn, "SFFrom").ToString();
			string password = Terrasoft.Core.Configuration.SysSettings.GetValue(userConn, "SFPassword").ToString();
			Stream FileA = null;
			string Fname = "";
			var esq = new EntitySchemaQuery(userConn.EntitySchemaManager, SchemaName);
			esq.AddAllSchemaColumns();
			esq.Filters.Add(esq.CreateFilterWithParameters(FilterComparisonType.Equal, "Id",FileId));
			var coll = esq.GetEntityCollection(userConn);
			foreach(var ent in coll) {
				FileA = ent.GetStreamValue("Data");
				Fname = ent.GetTypedColumnValue<string>("Name");
				break;
			}
			try {
				MailMessage mail = new MailMessage();
				mail.From = new MailAddress(from);
				mail.To.Add(new MailAddress(mailto));
				mail.Subject = caption;
				mail.Body = message;
				mail.IsBodyHtml = true;
				if (FileA != null)
					mail.Attachments.Add(new Attachment(FileA, Fname));
				SmtpClient client = new SmtpClient();
				client.Host = smtpServer;
				client.Port = 587;
 
				client.EnableSsl = true;
				client.Credentials = new NetworkCredential(from.Split('@')[0], password);
				client.DeliveryMethod = SmtpDeliveryMethod.Network;
 
				client.Send(mail);
				mail.Dispose();
				return true;
			} catch(Exception e) {
				throw new Exception("Mail.Send: " + e.Message);
			}
		}