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I have a class named Product in class library project. I am using SubSonic SimpleRepository to persist objects. I have a method as follows in Product class: public static IList<Product> Load(Expression<Func<Product, bool>> expression) { var rep=RepoHelper.GetRepo("ConStr"); var products = rep.Find(expression); return products.ToList(); } I'm calling this function like this: private void BindData() { var list = Product.Load(x => x.Active);//Active is of type bool rptrItems.DataSource = list; rptrItems.DataBind(); } Calling Load from BindData throws the exception: variable 'x' of type 'Product' referenced from scope '', but it is not defined How can I resolve this. EDIT:- by stepping through SubSonic code I found that the error is thrown by this function private static Expression Evaluate(Expression e) { if(e.NodeType == ExpressionType.Constant) return e; Type type = e.Type; if(type.IsValueType) e = Expression.Convert(e, typeof(object)); Expression<Func<object>> lambda = Expression.Lambda<Func<object>>(e); Func<object> fn = lambda.Compile(); //THIS THROWS EXCEPTION return Expression.Constant(fn(), type); }

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