diff --git a/YantraJS.Core/LinqExpressions/JSGeneratorFunctionBuilderV2.cs b/YantraJS.Core/LinqExpressions/JSGeneratorFunctionBuilderV2.cs
index 2f2702fc..6f2c3cb9 100644
--- a/YantraJS.Core/LinqExpressions/JSGeneratorFunctionBuilderV2.cs
+++ b/YantraJS.Core/LinqExpressions/JSGeneratorFunctionBuilderV2.cs
@@ -13,20 +13,21 @@
 using SwitchCase = YantraJS.Expressions.YSwitchCaseExpression;
 using GotoExpression = YantraJS.Expressions.YGoToExpression;
 using TryExpression = YantraJS.Expressions.YTryCatchFinallyExpression;
+using YantraJS.Core.LambdaGen;
 
 namespace YantraJS.ExpHelper
 {
     public class JSGeneratorFunctionBuilderV2
     {
-        private static Type type = typeof(JSGeneratorFunctionV2);
-
-        private static ConstructorInfo _New =
-            type.Constructor(
-                typeof(JSGeneratorDelegateV2), StringSpanBuilder.RefType, StringSpanBuilder.RefType);
 
         public static Expression New(Expression @delegate, Expression name, Expression code)
         {
-            return Expression.New(_New, @delegate, name, code);
+            return NewLambdaExpression.NewExpression<JSGeneratorFunctionV2>(() =>
+            () => new JSGeneratorFunctionV2((JSGeneratorDelegateV2)null, "", "")
+                ,@delegate
+                ,name
+                ,code);
+            // return Expression.New(_New, @delegate, name, code);
         }
     }
 }
diff --git a/YantraJS.Core/LinqExpressions/JSNullBuilder.cs b/YantraJS.Core/LinqExpressions/JSNullBuilder.cs
index 4314c49b..c32608af 100644
--- a/YantraJS.Core/LinqExpressions/JSNullBuilder.cs
+++ b/YantraJS.Core/LinqExpressions/JSNullBuilder.cs
@@ -11,6 +11,7 @@
 using SwitchCase = YantraJS.Expressions.YSwitchCaseExpression;
 using GotoExpression = YantraJS.Expressions.YGoToExpression;
 using TryExpression = YantraJS.Expressions.YTryCatchFinallyExpression;
+using YantraJS.Core.LambdaGen;
 
 namespace YantraJS.ExpHelper
 {
@@ -18,11 +19,13 @@ public class JSNullBuilder
     {
 
         public static Expression Value =
-             Expression.TypeAs(
-                 Expression.Field(
-                        null, 
-                        typeof(JSNull)
-                            .GetField(nameof(JSNull.Value))), 
-                 typeof(JSValue));
+             // Expression.TypeAs(
+                 NewLambdaExpression.StaticFieldExpression<JSValue>(() => () => JSNull.Value)
+                 //, Expression.Field(
+                 //       null, 
+                 //       typeof(JSNull)
+                 //           .GetField(nameof(JSNull.Value))), 
+                 // typeof(JSValue))
+                 ;
     }
 }
diff --git a/YantraJS.Core/LinqExpressions/JSNumberBuilder.cs b/YantraJS.Core/LinqExpressions/JSNumberBuilder.cs
index 5365c09a..132a234c 100644
--- a/YantraJS.Core/LinqExpressions/JSNumberBuilder.cs
+++ b/YantraJS.Core/LinqExpressions/JSNumberBuilder.cs
@@ -12,38 +12,44 @@
 using SwitchCase = YantraJS.Expressions.YSwitchCaseExpression;
 using GotoExpression = YantraJS.Expressions.YGoToExpression;
 using TryExpression = YantraJS.Expressions.YTryCatchFinallyExpression;
+using YantraJS.Core.LambdaGen;
 
 namespace YantraJS.ExpHelper
 {
     public class JSNumberBuilder
     {
-        static Type type = typeof(JSNumber);
+        // static Type type = typeof(JSNumber);
 
         public static Expression NaN =
-            Expression.Field(null, type.GetField(nameof(JSNumber.NaN)));
+            NewLambdaExpression.StaticFieldExpression<JSNumber>(() => () => JSNumber.NaN);
+            // Expression.Field(null, type.GetField(nameof(JSNumber.NaN)));
 
         public static Expression Zero =
-            Expression.Field(null, type.GetField(nameof(JSNumber.Zero)));
+            NewLambdaExpression.StaticFieldExpression<JSNumber>(() => () => JSNumber.Zero);
+            // Expression.Field(null, type.GetField(nameof(JSNumber.Zero)));
 
         public static Expression One =
-            Expression.Field(null, type.GetField(nameof(JSNumber.One)));
+            NewLambdaExpression.StaticFieldExpression<JSNumber>(() => () => JSNumber.One);
+            // Expression.Field(null, type.GetField(nameof(JSNumber.One)));
 
         public static Expression MinusOne =
-            Expression.Field(null, type.GetField(nameof(JSNumber.MinusOne)));
+            NewLambdaExpression.StaticFieldExpression<JSNumber>(() => () => JSNumber.MinusOne);
+            // Expression.Field(null, type.GetField(nameof(JSNumber.MinusOne)));
 
         public static Expression Two =
-            Expression.Field(null, type.GetField(nameof(JSNumber.Two)));
+            NewLambdaExpression.StaticFieldExpression<JSNumber>(() => () => JSNumber.Two);
+            // Expression.Field(null, type.GetField(nameof(JSNumber.Two)));
 
-        private static FieldInfo _Value =
-            type.InternalField(nameof(Core.JSNumber.value));
+        //private static FieldInfo _Value =
+        //    type.InternalField(nameof(Core.JSNumber.value));
 
-        public static Expression Value(Expression ex)
-        {
-            return Expression.Field(ex, _Value);
-        }
+        //public static Expression Value(Expression ex)
+        //{
+        //    return Expression.Field(ex, _Value);
+        //}
 
-        private static ConstructorInfo _NewDouble
-            = type.Constructor(typeof(double));
+        //private static ConstructorInfo _NewDouble
+        //    = type.Constructor(typeof(double));
 
         public static Expression New(Expression exp)
         {
@@ -51,16 +57,19 @@ public static Expression New(Expression exp)
             {
                 exp = Expression.Convert(exp, typeof(double));
             }
-            return  Expression.TypeAs(Expression.New(_NewDouble, exp), typeof(JSValue));
+            return Expression.TypeAs(
+                NewLambdaExpression.NewExpression<JSNumber>(() => () => new JSNumber((double)0), exp)
+                , typeof(JSValue));
+            // return  Expression.TypeAs(Expression.New(_NewDouble, exp), typeof(JSValue));
         }
 
-        private static MethodInfo _AddValue =
-                        type.InternalMethod(nameof(Core.JSValue.AddValue), typeof(Core.JSValue));
+        //private static MethodInfo _AddValue =
+        //                type.InternalMethod(nameof(Core.JSValue.AddValue), typeof(Core.JSValue));
 
-        public static Expression AddValue(Expression target, Expression value)
-        {
-            return Expression.Call(target, _AddValue, value);
-        }
+        //public static Expression AddValue(Expression target, Expression value)
+        //{
+        //    return Expression.Call(target, _AddValue, value);
+        //}
 
 
     }