完善 Distinct 注释

Author: 28810

FreeSql/Interface/Curd/ISelect/ISelect0.cs

@@ -255,6 +255,12 @@ public interface ISelect0<TSelect, T1>
 
         /// <summary>
         /// 查询数据前，去重
+        /// <para>
+        /// .Distinct().ToList(x => x.GroupName) 对指定字段去重
+        /// </para>
+        /// <para>
+        /// .Distinct().ToList() 对整个查询去重
+        /// </para>
         /// </summary>
         /// <returns></returns>
         TSelect Distinct();