gistfile1.txt

public static void TestMapper<TSource>(TSource model, Expression<Func<TSource, object>> expression)
        {
            var body = (NewExpression) expression.Body;
            foreach (var argument in body.Arguments)
            {
                var lambda = Expression.Lambda<Func<TSource, object>>(argument, expression.Parameters[0]);
                var modelMetadata = ModelMetadata.FromLambdaExpression(lambda, new ViewDataDictionary<TSource>(model));
            }
        }