diff --git a/Extensions/FreeSql.Generator/RazorModel.cs b/Extensions/FreeSql.Generator/RazorModel.cs
index 80f7a855..d754ee2f 100644
--- a/Extensions/FreeSql.Generator/RazorModel.cs
+++ b/Extensions/FreeSql.Generator/RazorModel.cs
@@ -66,19 +66,23 @@ public class RazorModel {
 		if (GetCsName(col.Name) != col.Name)
 			sb.Add("Name = \"" + col.Name + "\"");
 
-		var dbinfo = fsql.CodeFirst.GetDbInfo(col.CsType);
-		if (dbinfo != null && dbinfo.Value.dbtypeFull.Replace("NOT NULL", "").Trim() != col.DbTypeTextFull)
-			sb.Add("DbType = \"" + col.DbTypeTextFull + "\"");
-		if (col.IsPrimary)
-			sb.Add("IsPrimary = true");
-		if (col.IsIdentity)
-			sb.Add("IsIdentity = true");
+		if (col.CsType != null)
+		{
+			var dbinfo = fsql.CodeFirst.GetDbInfo(col.CsType);
+			if (dbinfo != null && dbinfo.Value.dbtypeFull.Replace("NOT NULL", "").Trim() != col.DbTypeTextFull)
+				sb.Add("DbType = \"" + col.DbTypeTextFull + "\"");
+			if (col.IsPrimary)
+				sb.Add("IsPrimary = true");
+			if (col.IsIdentity)
+				sb.Add("IsIdentity = true");
 
-		if (dbinfo != null && dbinfo.Value.isnullable != col.IsNullable) {
-			if (col.IsNullable && fsql.DbFirst.GetCsType(col).Contains("?") == false && col.CsType.IsValueType)
-				sb.Add("IsNullable = true");
-			if (col.IsNullable == false && fsql.DbFirst.GetCsType(col).Contains("?") == true)
-				sb.Add("IsNullable = false");
+			if (dbinfo != null && dbinfo.Value.isnullable != col.IsNullable)
+			{
+				if (col.IsNullable && fsql.DbFirst.GetCsType(col).Contains("?") == false && col.CsType.IsValueType)
+					sb.Add("IsNullable = true");
+				if (col.IsNullable == false && fsql.DbFirst.GetCsType(col).Contains("?") == true)
+					sb.Add("IsNullable = false");
+			}
 		}
 		if (sb.Any() == false) return null;
 		return "[Column(" + string.Join(", ", sb) + ")]";
diff --git a/FreeSql.DbContext/FreeSql.DbContext.xml b/FreeSql.DbContext/FreeSql.DbContext.xml
index dc0203b8..d9f91124 100644
--- a/FreeSql.DbContext/FreeSql.DbContext.xml
+++ b/FreeSql.DbContext/FreeSql.DbContext.xml
@@ -110,6 +110,13 @@
             清空状态数据
             </summary>
         </member>
+        <member name="M:FreeSql.DbSet`1.RemoveAsync(System.Linq.Expressions.Expression{System.Func{`0,System.Boolean}})">
+            <summary>
+            根据 lambda 条件删除数据
+            </summary>
+            <param name="predicate"></param>
+            <returns></returns>
+        </member>
         <member name="M:FreeSql.DbSet`1.Add(`0)">
             <summary>
             添加
diff --git a/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/g.cs b/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/g.cs
index bd719336..7ae66c0d 100644
--- a/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/g.cs
+++ b/FreeSql.Tests/FreeSql.Tests.Provider.Odbc/g.cs
@@ -83,6 +83,21 @@ public class g
         .Build());
     public static IFreeSql dameng => damemgLazy.Value;
 
+
+    static Lazy<IFreeSql> gbaseLazy = new Lazy<IFreeSql>(() => new FreeSql.FreeSqlBuilder()
+        .UseConnectionString(FreeSql.DataType.OdbcDameng, "Driver={DM8 ODBC DRIVER};Server=127.0.0.1:5236;Persist Security Info=False;Trusted_Connection=Yes;UID=USER1;PWD=123456789")
+        //.UseConnectionFactory(FreeSql.DataType.OdbcDameng, () => new System.Data.Odbc.OdbcConnection("Driver={DM8 ODBC DRIVER};Server=127.0.0.1:5236;Persist Security Info=False;Trusted_Connection=Yes;UID=USER1;PWD=123456789"))
+        .UseAutoSyncStructure(true)
+        .UseLazyLoading(true)
+        .UseSyncStructureToUpper(true)
+        //.UseNoneCommandParameter(true)
+
+        .UseMonitorCommand(
+            cmd => Trace.WriteLine(cmd.CommandText), //监听SQL命令对象，在执行前
+            (cmd, traceLog) => Console.WriteLine(traceLog))
+        .Build());
+    public static IFreeSql gbase => gbaseLazy.Value;
+
     //启动神州通用数据库 /etc/init.d/oscardb_OSRDBd start
     //SYSDBA 密码 szoscar55