My solutions for the C# Intermediate: Classes, Interfaces and OOP by Mosh Hamedani course
Exercise: Design a Stack A Stack is a data structure for storing a list of elements in a LIFO (last in, first out) fashion. Design a class called Stack with three methods. void Push(object obj) object Pop() void Clear()
Exercise: Design a Stopwatch Design a class called Stopwatch. The job of this class is to simulate a stopwatch. It should provide two methods: Start and Stop. We call the start method first, and the stop method next. Then we ask the stopwatch about the duration between start and stop. Duration should be a value in TimeSpan. Display the duration on the console.
Exercise: Design a StackOverflow Post Design a class called Post. This class models a StackOverflow post. It should have properties for title, description and the date/time it was created. We should be able to up-vote or down-vote a post. We should also be able to see the current vote value. In the main method, create a post, up-vote and down-vote it a few times and then display the the current vote value.
Exercise: Design a workflow engine Design a workflow engine that takes a workflow object and runs it. A workflow is a series of steps or activities. The workflow engine class should have one method called Run() that takes a workflow, and then iterates over each activity in the workflow and runs it.
Exercise: Design a database connection To access a database, we need to open a connection to it first and close it once our job is done. Connecting to a database depends on the type of the target database and the database management system (DBMS). For example, connecting to a SQL Server database is different from connecting to an Oracle database. But both these connections have a few things in common: • They have a connection string • They can be opened • They can be closed • They may have a timeout attribute (so if the connection could not be opened within the timeout, an exception will be thrown). Your job is to represent these commonalities in a base class called DbConnection. This class should have two properties: ConnectionString : string Timeout : TimeSpan
Now that we have the concept of a DbConnection, let’s work out how to represent a DbCommand. Design a class called DbCommand for executing an instruction against the database
OBS: Those are just the exercises "basic ideas", not the full structions :) just so you can understand the codes