diff --git a/Examples/base_entity/Program.cs b/Examples/base_entity/Program.cs
index a6a508398..311f03831 100644
--- a/Examples/base_entity/Program.cs
+++ b/Examples/base_entity/Program.cs
@@ -205,6 +205,7 @@ namespace base_entity
             new S_SysConfig<TestConfig> { Name = "testkey22", Config = new TestConfig { clicks = 22, title = "testtitle22" }, Config2 = new TestConfig { clicks = 11, title = "testtitle11" } }.Save();
             new S_SysConfig<TestConfig> { Name = "testkey33", Config = new TestConfig { clicks = 33, title = "testtitle33" }, Config2 = new TestConfig { clicks = 11, title = "testtitle11" } }.Save();
             var testconfigs11 = S_SysConfig<TestConfig>.Select.ToList();
+            var testconfigs11tb = S_SysConfig<TestConfig>.Select.ToDataTable();
             var testconfigs111 = S_SysConfig<TestConfig>.Select.ToList(a => a.Name);
             var testconfigs112 = S_SysConfig<TestConfig>.Select.ToList(a => a.Config);
             var testconfigs1122 = S_SysConfig<TestConfig>.Select.ToList(a => new { a.Name, a.Config });
diff --git a/FreeSql.Tests/FreeSql.Tests.Provider.MySqlConnector/MySqlConnector/MySqlCodeFirstTest.cs b/FreeSql.Tests/FreeSql.Tests.Provider.MySqlConnector/MySqlConnector/MySqlCodeFirstTest.cs
index 004101065..98cec1d37 100644
--- a/FreeSql.Tests/FreeSql.Tests.Provider.MySqlConnector/MySqlConnector/MySqlCodeFirstTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests.Provider.MySqlConnector/MySqlConnector/MySqlCodeFirstTest.cs
@@ -417,6 +417,7 @@ namespace FreeSql.Tests.MySqlConnector
             Assert.Equal(item2.testFieldString, newitem2.testFieldString);
 
             var items = select.ToList();
+            var itemstb = select.ToDataTable();
         }
 
 
diff --git a/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/Dameng/DamengCodeFirstTest.cs b/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/Dameng/DamengCodeFirstTest.cs
index 319fdfbf1..be8559fe2 100644
--- a/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/Dameng/DamengCodeFirstTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/Dameng/DamengCodeFirstTest.cs
@@ -295,6 +295,7 @@ namespace FreeSql.Tests.Odbc.Dameng
             Assert.Equal(item2.String, newitem2.String);
 
             var items = select.ToList();
+            var itemstb = select.ToDataTable();
         }
 
         [Table(Name = "tb_alltype")]
diff --git a/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/Default/OdbcCodeFirstTest.cs b/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/Default/OdbcCodeFirstTest.cs
index ed20c3ba0..f58d1305e 100644
--- a/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/Default/OdbcCodeFirstTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/Default/OdbcCodeFirstTest.cs
@@ -123,6 +123,7 @@ namespace FreeSql.Tests.Odbc.Default
             Assert.Equal(item2.testFieldString, newitem2.testFieldString);
 
             var items = select.ToList();
+            var itemstb = select.ToDataTable();
         }
 
         [Table(Name = "tb_alltype_notime")]
diff --git a/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/KingbaseES/KingbaseESCodeFirstTest.cs b/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/KingbaseES/KingbaseESCodeFirstTest.cs
index 681940381..271a76bf4 100644
--- a/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/KingbaseES/KingbaseESCodeFirstTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/KingbaseES/KingbaseESCodeFirstTest.cs
@@ -270,6 +270,7 @@ namespace FreeSql.Tests.Odbc.KingbaseES
             Assert.Equal(item2.String, newitem2.String);
 
             var items = select.ToList();
+            var itemstb = select.ToDataTable();
         }
 
         [Table(Name = "tb_alltype")]
diff --git a/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/MySql/MySqlCodeFirstTest.cs b/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/MySql/MySqlCodeFirstTest.cs
index efa927791..43176a37f 100644
--- a/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/MySql/MySqlCodeFirstTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/MySql/MySqlCodeFirstTest.cs
@@ -271,6 +271,7 @@ namespace FreeSql.Tests.Odbc.MySql
             Assert.Equal(item2.testFieldString, newitem2.testFieldString);
 
             var items = select.ToList();
+            var itemstb = select.ToDataTable();
         }
 
 
diff --git a/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/Oracle/OracleCodeFirstTest.cs b/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/Oracle/OracleCodeFirstTest.cs
index a9e24fc53..95cd27200 100644
--- a/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/Oracle/OracleCodeFirstTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/Oracle/OracleCodeFirstTest.cs
@@ -294,6 +294,7 @@ namespace FreeSql.Tests.Odbc.Oracle
             Assert.Equal(item2.String, newitem2.String);
 
             var items = select.ToList();
+            var itemstb = select.ToDataTable();
         }
 
         [Table(Name = "tb_alltype")]
diff --git a/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/PostgreSQL/PostgreSQLCodeFirstTest.cs b/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/PostgreSQL/PostgreSQLCodeFirstTest.cs
index 9b8e95e70..d46ae080e 100644
--- a/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/PostgreSQL/PostgreSQLCodeFirstTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/PostgreSQL/PostgreSQLCodeFirstTest.cs
@@ -208,6 +208,7 @@ namespace FreeSql.Tests.Odbc.PostgreSQL
             Assert.Equal(item2.testFieldString, newitem2.testFieldString);
 
             var items = select.ToList();
+            var itemstb = select.ToDataTable();
         }
 
         [Table(Name = "tb_alltype")]
diff --git a/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/SqlServer/SqlServerCodeFirstTest.cs b/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/SqlServer/SqlServerCodeFirstTest.cs
index 2642bf0ca..48bfefbdd 100644
--- a/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/SqlServer/SqlServerCodeFirstTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/SqlServer/SqlServerCodeFirstTest.cs
@@ -240,6 +240,7 @@ namespace FreeSql.Tests.Odbc.SqlServer
             Assert.Equal(item2.testFieldString, newitem2.testFieldString);
 
             var items = select.ToList();
+            var itemstb = select.ToDataTable();
         }
 
         [JsonObject(MemberSerialization.OptIn), Table(Name = "dbo.tb_alltype")]
diff --git a/FreeSql.Tests/FreeSql.Tests.Provider.PostgreSQL.NetTopologySuite/PostgreSQL/PostgreSQLCodeFirstTest.cs b/FreeSql.Tests/FreeSql.Tests.Provider.PostgreSQL.NetTopologySuite/PostgreSQL/PostgreSQLCodeFirstTest.cs
index 5d0b0a301..59fa573c3 100644
--- a/FreeSql.Tests/FreeSql.Tests.Provider.PostgreSQL.NetTopologySuite/PostgreSQL/PostgreSQLCodeFirstTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests.Provider.PostgreSQL.NetTopologySuite/PostgreSQL/PostgreSQLCodeFirstTest.cs
@@ -268,6 +268,7 @@ namespace FreeSql.Tests.PostgreSQL.NetTopologySuite
             Assert.Equal(item2.testFieldString, newitem2.testFieldString);
 
             var items = select.ToList();
+            var itemstb = select.ToDataTable();
         }
 
         [Table(Name = "tb_alltype_nts")]
diff --git a/FreeSql.Tests/FreeSql.Tests/Dameng/DamengCodeFirstTest.cs b/FreeSql.Tests/FreeSql.Tests/Dameng/DamengCodeFirstTest.cs
index 94af3999b..4369ea873 100644
--- a/FreeSql.Tests/FreeSql.Tests/Dameng/DamengCodeFirstTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests/Dameng/DamengCodeFirstTest.cs
@@ -361,6 +361,7 @@ namespace FreeSql.Tests.Dameng
             Assert.Equal(item2.String, newitem2.String);
 
             var items = select.ToList();
+            var itemstb = select.ToDataTable();
         }
 
         [Table(Name = "tb_alltype")]
diff --git a/FreeSql.Tests/FreeSql.Tests/MsAccess/MsAccessCodeFirstTest.cs b/FreeSql.Tests/FreeSql.Tests/MsAccess/MsAccessCodeFirstTest.cs
index e11d0b2b9..5c2dc9c0f 100644
--- a/FreeSql.Tests/FreeSql.Tests/MsAccess/MsAccessCodeFirstTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests/MsAccess/MsAccessCodeFirstTest.cs
@@ -286,6 +286,7 @@ namespace FreeSql.Tests.MsAccess
             Assert.Equal(item2.String, newitem2.String);
 
             var items = select.ToList();
+            var itemstb = select.ToDataTable();
         }
 
         [Table(Name = "tb_alltype")]
diff --git a/FreeSql.Tests/FreeSql.Tests/MySql/MySqlCodeFirstTest.cs b/FreeSql.Tests/FreeSql.Tests/MySql/MySqlCodeFirstTest.cs
index 58274df02..346a806cf 100644
--- a/FreeSql.Tests/FreeSql.Tests/MySql/MySqlCodeFirstTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests/MySql/MySqlCodeFirstTest.cs
@@ -422,6 +422,7 @@ namespace FreeSql.Tests.MySql
             Assert.Equal(item2.testFieldString, newitem2.testFieldString);
 
             var items = select.ToList();
+            var itemstb = select.ToDataTable();
         }
 
 
diff --git a/FreeSql.Tests/FreeSql.Tests/Oracle/OracleCodeFirstTest.cs b/FreeSql.Tests/FreeSql.Tests/Oracle/OracleCodeFirstTest.cs
index cf5e48348..7e334513c 100644
--- a/FreeSql.Tests/FreeSql.Tests/Oracle/OracleCodeFirstTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests/Oracle/OracleCodeFirstTest.cs
@@ -395,6 +395,7 @@ namespace FreeSql.Tests.Oracle
             Assert.Equal(item2.String, newitem2.String);
 
             var items = select.ToList();
+            var itemstb = select.ToDataTable();
         }
 
         [Table(Name = "tb_alltype")]
diff --git a/FreeSql.Tests/FreeSql.Tests/PostgreSQL/PostgreSQLCodeFirstTest.cs b/FreeSql.Tests/FreeSql.Tests/PostgreSQL/PostgreSQLCodeFirstTest.cs
index b96b1eeca..094a3afa1 100644
--- a/FreeSql.Tests/FreeSql.Tests/PostgreSQL/PostgreSQLCodeFirstTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests/PostgreSQL/PostgreSQLCodeFirstTest.cs
@@ -426,6 +426,7 @@ namespace FreeSql.Tests.PostgreSQL
             Assert.Equal(item2.testFieldString, newitem2.testFieldString);
 
             var items = select.ToList();
+            var itemstb = select.ToDataTable();
         }
 
         [Table(Name = "tb_alltype")]
diff --git a/FreeSql.Tests/FreeSql.Tests/ShenTong/ShenTongCodeFirstTest.cs b/FreeSql.Tests/FreeSql.Tests/ShenTong/ShenTongCodeFirstTest.cs
index 8031a61f6..6c6f93d5d 100644
--- a/FreeSql.Tests/FreeSql.Tests/ShenTong/ShenTongCodeFirstTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests/ShenTong/ShenTongCodeFirstTest.cs
@@ -251,6 +251,7 @@ namespace FreeSql.Tests.ShenTong
             Assert.Equal(item2.testFieldString, newitem2.testFieldString);
 
             var items = select.ToList();
+            var itemstb = select.ToDataTable();
         }
 
         [Table(Name = "tb_alltype")]
diff --git a/FreeSql.Tests/FreeSql.Tests/SqlServer/SqlServerCodeFirstTest.cs b/FreeSql.Tests/FreeSql.Tests/SqlServer/SqlServerCodeFirstTest.cs
index c32f9287c..20723d8bb 100644
--- a/FreeSql.Tests/FreeSql.Tests/SqlServer/SqlServerCodeFirstTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests/SqlServer/SqlServerCodeFirstTest.cs
@@ -276,6 +276,7 @@ namespace FreeSql.Tests.SqlServer
             Assert.Equal(item2.testFieldString, newitem2.testFieldString);
 
             var items = select.ToList();
+            var itemstb = select.ToDataTable();
         }
 
         [JsonObject(MemberSerialization.OptIn), Table(Name = "dbo.tb_alltype")]
diff --git a/FreeSql.Tests/FreeSql.Tests/Sqlite/SqliteCodeFirstTest.cs b/FreeSql.Tests/FreeSql.Tests/Sqlite/SqliteCodeFirstTest.cs
index 65c62fc17..d3634ce26 100644
--- a/FreeSql.Tests/FreeSql.Tests/Sqlite/SqliteCodeFirstTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests/Sqlite/SqliteCodeFirstTest.cs
@@ -347,6 +347,7 @@ namespace FreeSql.Tests.Sqlite
             Assert.Equal(item2.String, newitem2.String);
 
             var items = select.ToList();
+            var itemstb = select.ToDataTable();
         }
 
         [Table(Name = "tb_alltype")]
diff --git a/FreeSql/Internal/CommonProvider/AdoProvider/AdoProvider.cs b/FreeSql/Internal/CommonProvider/AdoProvider/AdoProvider.cs
index 0612f43d6..8d1d81d7f 100644
--- a/FreeSql/Internal/CommonProvider/AdoProvider/AdoProvider.cs
+++ b/FreeSql/Internal/CommonProvider/AdoProvider/AdoProvider.cs
@@ -675,7 +675,7 @@ namespace FreeSql.Internal.CommonProvider
                     {
                         var name = dr.GetName(a);
                         if (dt.Columns.Contains(name)) name = $"{name}_{Guid.NewGuid().ToString("N").Substring(0, 4)}";
-                        dt.Columns.Add(name);
+                        dt.Columns.Add(name, dr.GetFieldType(a));
                     }
                 }
                 object[] values = new object[dt.Columns.Count];
@@ -699,7 +699,7 @@ namespace FreeSql.Internal.CommonProvider
                     {
                         var name = dr.GetName(a);
                         if (ret.Columns.Contains(name)) name = $"{name}_{Guid.NewGuid().ToString("N").Substring(0, 4)}";
-                        ret.Columns.Add(name);
+                        ret.Columns.Add(name, dr.GetFieldType(a));
                     }
                 object[] values = new object[ret.Columns.Count];
                 dr.GetValues(values);
diff --git a/FreeSql/Internal/CommonProvider/AdoProvider/AdoProviderAsync.cs b/FreeSql/Internal/CommonProvider/AdoProvider/AdoProviderAsync.cs
index 8254462b9..92e873e30 100644
--- a/FreeSql/Internal/CommonProvider/AdoProvider/AdoProviderAsync.cs
+++ b/FreeSql/Internal/CommonProvider/AdoProvider/AdoProviderAsync.cs
@@ -598,7 +598,7 @@ namespace FreeSql.Internal.CommonProvider
                     {
                         var name = dr.GetName(a);
                         if (dt.Columns.Contains(name)) name = $"{name}_{Guid.NewGuid().ToString("N").Substring(0, 4)}";
-                        dt.Columns.Add(name);
+                        dt.Columns.Add(name, dr.GetFieldType(a));
                     }
                 }
                 object[] values = new object[dt.Columns.Count];
@@ -622,7 +622,7 @@ namespace FreeSql.Internal.CommonProvider
                     {
                         var name = dr.GetName(a);
                         if (ret.Columns.Contains(name)) name = $"{name}_{Guid.NewGuid().ToString("N").Substring(0, 4)}";
-                        ret.Columns.Add(name);
+                        ret.Columns.Add(name, dr.GetFieldType(a));
                     }
                 object[] values = new object[ret.Columns.Count];
                 for (int a = 0; a < values.Length; a++) if (!await dr.IsDBNullAsync(a)) values[a] = await dr.GetFieldValueAsync<object>(a);