Add demo

Src/Asp.Net/OracleTest/Demo/Demo1_Queryable.cs

@@ -33,6 +33,10 @@ namespace OrmTest
             var getAll = db.Queryable<Order>().ToList();
             var getpage = db.Queryable<Order>().ToPageList(0,5);
             var getpage2 = db.Queryable<Order>().ToOffsetPage(0,5);
+            int count= 0;
+            var getpage3 = db.Queryable<Order>().ToOffsetPage(0, 5,ref count);
+            RefAsync<int> count2 = 0;
+            var getpage4 = db.Queryable<Order>().ToOffsetPageAsync(0, 5, count2).GetAwaiter().GetResult();
             var getOrderBy = db.Queryable<Order>().OrderBy(it => it.Name,OrderByType.Desc).ToList();
             var getOrderBy2 = db.Queryable<Order>().OrderBy(it => it.Id).OrderBy(it => it.Name, OrderByType.Desc).ToList();
             var getOrderBy3 = db.Queryable<Order>().OrderBy(it =>new { it.Name,it.Id}).ToList();

Src/Asp.NetCore2/SqlSugar/SqlSugarForCore.nuspec

@@ -2,7 +2,7 @@
 <package >
   <metadata>
     <id>SqlSugarCore</id>
-    <version>5.1.3.25</version>
+    <version>5.1.3.27-preview01</version>
     <authors>sunkaixuan</authors>
     <owners>果糖大数据科技</owners>
     <licenseUrl>http://www.apache.org/licenses/LICENSE-2.0.html</licenseUrl>