diff --git a/FreeSql/Internal/CommonProvider/SelectProvider/Select0ProviderReader.cs b/FreeSql/Internal/CommonProvider/SelectProvider/Select0ProviderReader.cs
index a347470a..079c25e2 100644
--- a/FreeSql/Internal/CommonProvider/SelectProvider/Select0ProviderReader.cs
+++ b/FreeSql/Internal/CommonProvider/SelectProvider/Select0ProviderReader.cs
@@ -384,7 +384,7 @@ namespace FreeSql.Internal.CommonProvider
                 //typeof(Topic).GetMethod("get_Type").IsVirtual
 
                 var field = new StringBuilder();
-                var dicfield = new Dictionary<string, bool>();
+                var dicfield = new Dictionary<string, bool>(StringComparer.CurrentCultureIgnoreCase);
                 var tb = _tables.First();
                 var index = 0;
 
@@ -526,7 +526,7 @@ namespace FreeSql.Internal.CommonProvider
                 //typeof(Topic).GetMethod("get_Type").IsVirtual
 
                 var field = new StringBuilder();
-                var dicfield = new Dictionary<string, bool>();
+                var dicfield = new Dictionary<string, bool>(StringComparer.CurrentCultureIgnoreCase);
                 var tb = _tables.First();
                 var index = 0;
                 var otherindex = 0;