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# Bank Account Simulate a bank account supporting opening/closing, withdrawals, and deposits of money. Watch out for concurrent transactions! A bank account can be accessed in multiple ways. Clients can make deposits and withdrawals using the internet, mobile phones, etc. Shops can charge against the account. Create an account that can be accessed from multiple threads/processes (terminology depends on your programming language). It should be possible to close an account; operations against a closed account must fail. ## Instructions Run the test file, and fix each of the errors in turn. When you get the first test to pass, go to the first pending or skipped test, and make that pass as well. When all of the tests are passing, feel free to submit. Remember that passing code is just the first step. The goal is to work towards a solution that is as readable and expressive as you can make it. Have fun! ## Hints This exercise requires you to handle data related to currency and money. A normal approuch is to use the [Decimal](https://msdn.microsoft.com/en-US/library/system.decimal.aspx) struct to store currency values. Note though that you then only store the numeric value of a currency. ### Submitting Exercises Note that, when trying to submit an exercise, make sure the exercise file that you're submitting is in the `exercism/csharp/<exerciseName>` directory. For example, if you're submitting `bob.cs` for the Bob exercise, the submit command would be something like `exercism submit <path_to_exercism_dir>/csharp/bob/bob.cs`. ## Submitting Incomplete Solutions It's possible to submit an incomplete solution so you can see how others have completed the exercise.
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