using System.Text; namespace PlcSiemens.Core.Extension { public static class StringBuilderExtension { /// 追加分隔符字符串,忽略开头,常用于拼接 public static StringBuilder Separate(this StringBuilder sb, string separator) { if (sb == null || separator.IsNullOrEmpty()) return sb; if (sb.Length > 0) sb.Append(separator); return sb; } } }