need it in c#

Create a multi-class solution that includes a WeightConverter class. The WeightConverter class should be used to convert standard weight measurements. In your list of options, include as a minimum grams, kilograms, pounds, and ounces. Create an application class to test the WeightConverter class. If the user enters a negative number or a nonnumeric value, throw and handle an exception.can you upload the file so i could run it? thank you