Update Includes

Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/Includes.cs

@@ -267,7 +267,11 @@ namespace SqlSugar
 
         private void _Includes(  SqlSugarProvider context, params Expression [] includes)
         {
-            throw new NotImplementedException();
+            if (this.QueryBuilder.Includes == null) 
+            {
+                this.QueryBuilder.Includes =new  List<Expression[]>();
+            }
+            this.QueryBuilder.Includes.Add(includes);
         }
     }
 }

Src/Asp.Net/SqlSugar/Abstract/SqlBuilderProvider/QueryBuilder.cs

@@ -33,6 +33,7 @@ namespace SqlSugar
         #endregion
 
         #region Splicing basic
+        public List<Expression[]> Includes { get; set; }
         public List<string> IgnoreColumns { get; set; }
         public bool IsCount { get; set; }
         public bool IsSqlQuery { get; set; }

Src/Asp.Net/SqlSugar/Entities/Mapping/SugarMappingAttribute.cs

@@ -203,4 +203,23 @@ namespace SqlSugar
         }
     }
 
+    [AttributeUsage(AttributeTargets.Property, Inherited = true)]
+    public class Navigat: Attribute
+    {
+        public string name { get; set; }
+        public Type mappingType { get; set; }
+        public string aId { get; set; }
+        public string bId { get; set; }
+        public Navigat(string name)
+        {
+            this.name = name;
+        }
+        public Navigat(Type abType,string aId,string bId)
+        {
+            this.mappingType = mappingType;
+            this.aId = aId;
+            this.bId= bId;
+        }
+    }
+    
 }