Update demo

Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/UnitOneToOneDel.cs

@@ -0,0 +1,56 @@
+using SqlSeverTest.UserTestCases;
+using SqlSugar;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace OrmTest
+{
+    internal class UnitOneToOneDel
+    {
+        public static void Init()
+        {
+            var Db = new SqlSugarScope(new ConnectionConfig()
+            {
+                DbType = DbType.SqlServer,
+                ConnectionString = Config.ConnectionString,
+                IsAutoCloseConnection = true
+            });
+            Db.CodeFirst.InitTables<School, Grade>();
+            Db.DbMaintenance.TruncateTable<School, Grade>();
+            Db.Insertable(new School()
+            {
+                Id = 1,
+                Name = "a"
+            }).ExecuteCommand();
+            Db.Insertable(new Grade()
+            {
+                 Name= "b",
+                  SchoolId=1,
+            }).ExecuteCommand();
+            Db.DeleteNav<School>(s => s.Id.Equals(1))
+                .Include(s => s.Grades).ExecuteCommandAsync().GetAwaiter().GetResult();
+            //Console.ReadLine();
+
+        }
+    }
+
+    [SugarTable("unitSchooldfadsaa")]
+
+    public class School
+    {
+        [SqlSugar.SugarColumn(IsPrimaryKey = true, IsIdentity = true)]
+        public int Id { get; set; }
+        public string? Name { get; set; }
+        [Navigate(NavigateType.OneToOne, nameof(Id), nameof(Grade.SchoolId))]
+        public Grade Grades { get; set; }
+    }
+    [SugarTable("unitGradedfadsaa")]
+    public class Grade
+    {
+        [SqlSugar.SugarColumn(IsPrimaryKey = true, IsIdentity = true)]
+        public int Id { get; set; }
+        public string? Name { get; set; }
+        public int SchoolId { get; set; }
+    }
+}