A small console program that calculates optimal loans for borrowers, given a database of lenders and the requested amount.
Given a comma-separated list of lenders (each with a desired interest rate and available funds), and the amount required to borrow, the program will calculate how a loan can be constructed with the lowest possible interest rate.

Just clone and restore NuGet packages

Run the program like so: LendingQuotes.exe <csv file name> <amount to borrow> (LendingQuotes.exe myCsv.csv 1000) where your CSV file is of the following format:

Lender,Rate,Available
Bob,0.075,640
Jane,0.069,480

The program will output the best available rate for the requested amount, along with the monthly repayment amount and the total repayment amount.

The bulk of the work is done by the Model classes. LoanBuilder is used to construct a Loan object using the optimal (= lowest interest) available lenders for the given amount.
Once constructed, the Loan object calculates the rate, monthly and total repayments, based on the given lenders.

The code structure is inspired by onion architecture.

This is obviously a very simple program. To extend it to a full-blown application you'd probably want to do the following:

• Move Model , DAL and Output to their own projects (DLLs)
• Move tests to a separate DLL
• Create tests for the repository and output classes
• Use a proper DI mechanism
• Consider moving the logic of calculating rate and repayments out of the Loan model. This will allow for a little more testability, but especially- for seemlesly changing the way these are calculated (using the Strategy pattern)