Tag: C#

In the last several tutorials we have gone through the process of identifying several classes that would facilitate a basic CRM application. During the identification phase, we determine business entities, create properties, and scope out methods. Next we separate responsibilities with the goals of reducing coupling and making the code simpler. Now we reach the phase for establishing relationships between classes. The relationships define how objects work together to perform the work needed for the application to run.…

So far we have been looking at the specifics of how to create a class in C#, then add properties and methods to it. Now we want to add additional classes to the application. This is a customer relationship management type application so we’ll need things like an Order class, a Product class, an OrderItem class, and maybe a few others. In this tutorial we’ll start building out those classes to work with our existing Customer class while paying attention to thins like Coupling, Cohesion, Separation of Concerns, and Design Patterns.…

In this tutorial we’ll move forward with the Customer class we created in the last episode. Now we want to keep learning object-oriented fundamentals in C#, and to do that we are going to start looking at Methods. Our Customer class is going to need some methods such as Validate(), Retrieve(), and Save() to make it more useful. Properties only hold data, but if we want the class to be able to do work, we need to add these methods.…

In this tutorial, we are going to start the beginnings of a fictional CRM type application. A customer relationship management system simply keeps track of customers and their related data. We’ll use Visual Studio to build out a new Customer class, then define the properties that we need for a customer. These will include things like the first name, last name, email address, and so on.…

Software needs a way to make decisions as it makes progress through the execution of code. This is where control flow comes into play. The program control flow is provided to us by use of control statements. These are the special keywords in the C# language that allow the programmer to set up things like branching, looping, and even entire jumps to new points in the program during execution.…

Methods in C# and also in other programming languages are used to define behavior. They are used to write some focused logic used to complete a specific task and can be invoked, or called, to execute the code written inside of them. Methods inside classes have access modifiers, with the default being private. This means that the method is only available to use inside the same class.…

This tutorial will cover the different types available in the C# Programming language. In C#, every type belongs to one of two categories. These are Reference Types and Value Types. Reference Types and Value Types behave quite differently in a program so it’s important to understand how these different types work. The best way to do this is to simply write some sample code, maybe create some unit tests, and inspect the results in Visual Studio.…

Any time you are writing some software, you probably often find yourself reaching a certain point and then building and running the program to see if things work. As more and more code piles up, it becomes very time-consuming to run and inspect the results yourself. In C# and Visual Studio, it is possible to set up automated testing by way of Unit Tests. A unit test is simply when a developer writes some C# code to test other C# code in an automated fashion.…