janvanderhaegen

    //Shoutout to MBoros on stackoverflow
    public static class ExpressionCombiner {
        public static Expression<Func<T, bool>> And<T>(this Expression<Func<T, bool>> exp, Expression<Func<T, bool>> newExp)
        { 
            // get the visitor
            var visitor = new ParameterUpdateVisitor(newExp.Parameters.First(), exp.Parameters.First());
            // replace the parameter in the expression just created
            newExp = visitor.Visit(newExp) as Expression<Func<T, bool>>;

            // now you can and together the two expressions