diff --git a/Examples/base_entity/Program.cs b/Examples/base_entity/Program.cs
index f4177221..46b88d5b 100644
--- a/Examples/base_entity/Program.cs
+++ b/Examples/base_entity/Program.cs
@@ -559,9 +559,9 @@ namespace base_entity
                 //.UseConnectionString(FreeSql.DataType.Firebird, @"database=localhost:D:\fbdata\EXAMPLES.fdb;user=sysdba;password=123456;max pool size=5")
                 //.UseQuoteSqlName(false)
 
-                .UseConnectionString(FreeSql.DataType.MySql, "Data Source=127.0.0.1;Port=3306;User ID=root;Password=root;Initial Catalog=cccddd;Charset=utf8;SslMode=none;min pool size=1;Max pool size=3;AllowLoadLocalInfile=true")
+                //.UseConnectionString(FreeSql.DataType.MySql, "Data Source=127.0.0.1;Port=3306;User ID=root;Password=root;Initial Catalog=cccddd;Charset=utf8;SslMode=none;min pool size=1;Max pool size=3;AllowLoadLocalInfile=true")
 
-                .UseConnectionString(FreeSql.DataType.SqlServer, "Data Source=.;Integrated Security=True;Initial Catalog=freesqlTest;Pooling=true;Max Pool Size=3;TrustServerCertificate=true")
+                //.UseConnectionString(FreeSql.DataType.SqlServer, "Data Source=.;Integrated Security=True;Initial Catalog=freesqlTest;Pooling=true;Max Pool Size=3;TrustServerCertificate=true")
 
                 //.UseConnectionString(FreeSql.DataType.PostgreSQL, "Host=192.168.164.10;Port=5432;Username=postgres;Password=123456;Database=tedb;Pooling=true;Maximum Pool Size=2")
                 ////.UseConnectionString(FreeSql.DataType.PostgreSQL, "Host=192.168.164.10;Port=5432;Username=postgres;Password=123456;Database=toc;Pooling=true;Maximum Pool Size=2")
@@ -600,6 +600,14 @@ namespace base_entity
             BaseEntity.Initialization(fsql, () => _asyncUow.Value);
             #endregion
 
+            fsql.CodeFirst.Entity<B11>(e =>
+            {
+                e.Help().Navigate(b => b.a, nameof(B11.Id));
+            });
+            fsql.CodeFirst.Entity<A11>(e => { });
+
+            var a11sql01 = fsql.Select<B11>().Where(a => a.Id == 1).ToSql(a => new { a.Name, AName = a.a.Name });
+
             var risWorkListRepo = fsql.GetRepository<EBH_RisWorkList>();
             risWorkListRepo.InsertOrUpdate(new EBH_RisWorkList
             {
@@ -2929,4 +2937,16 @@ public class EBH_RisWorkList
     public string WorkStationAddress { get; set; }
 
 
+}
+public class A11
+{
+    public int Id { get; set; }
+    public string Name { get; set; }
+}
+
+public class B11
+{
+    public int Id { get; set; }
+    public string Name { get; set; }
+    public A11 a { get; set; }
 }
\ No newline at end of file
diff --git a/FreeSql/Extensions/AdoNetExtensions.cs b/FreeSql/Extensions/AdoNetExtensions.cs
index ed46fd09..d38f3522 100644
--- a/FreeSql/Extensions/AdoNetExtensions.cs
+++ b/FreeSql/Extensions/AdoNetExtensions.cs
@@ -29,7 +29,8 @@ namespace FreeSql
                     break;
                 case "SqlConnection":
                     providerType = Type.GetType("FreeSql.SqlServer.SqlServerProvider`1,FreeSql.Provider.SqlServer")?.MakeGenericType(connType);
-                    if (providerType == null) throw new Exception(CoreStrings.Missing_FreeSqlProvider_Package("SqlServer"));
+                    if (providerType == null) providerType = Type.GetType("FreeSql.SqlServer.SqlServerProvider`1,FreeSql.Provider.SqlServerForSystem")?.MakeGenericType(connType);
+                    if (providerType == null) throw new Exception(CoreStrings.Missing_FreeSqlProvider_Package("SqlServer/SqlServerForSystem"));
                     break;
                 case "NpgsqlConnection":
                     providerType = Type.GetType("FreeSql.PostgreSQL.PostgreSQLProvider`1,FreeSql.Provider.PostgreSQL")?.MakeGenericType(connType);
@@ -42,6 +43,7 @@ namespace FreeSql
                 case "SQLiteConnection":
                 case "SqliteConnection":
                     providerType = Type.GetType("FreeSql.Sqlite.SqliteProvider`1,FreeSql.Provider.Sqlite")?.MakeGenericType(connType);
+                    if (providerType == null) providerType = Type.GetType("FreeSql.Sqlite.SqliteProvider`1,FreeSql.Provider.SqliteCore")?.MakeGenericType(connType); //Microsoft.Data.Sqlite.Core.dll
                     if (providerType == null) throw new Exception(CoreStrings.Missing_FreeSqlProvider_Package("Sqlite/SqliteCore"));
                     break;
                 case "DmConnection":