InvalidOperationException: No method 'Where' on type 'System.Linq.Queryable' is compatible with the supplied arguments

Question

(Code below has been updated and worked properly)

There is dynamic OrderBy sample from LinqPad. What I want to do is just simply apply \'Where\' rather than \'OrderB

Answer 1

Your lambda expression creation looks odd to me. You're adding another parameter for no obvious reason. You're also using Predicate instead of Func. Try this:

LambdaExpression lambda = Expression.Lambda>(
                    Expression.GreaterThan(member, Expression.Constant(100)), 
                    purchaseParam);