Category: Programming

In this tutorial, we will see how to pass/get data to/from a thread in C#. To pass data into the thread we will simply pass it as an input parameter to the method that is being started as a new thread. To get the data from the thread a delegate callback method will be used. First, we will make a regular method that takes in an input parameter. Then we will make a delegate and make it point to this method. Finally, the delegate will be passed as an input parameter to the method that is being started as a new thread. When the child thread is done executing it will call the callback method that is located in the main thread and pass it the result as an input parameter. This is how we will be able to get the result from the child thread back into the main one.

Read more

In this tutorial, we will take a look at threads in C#. To explain what a thread is let’s first start off with the explanation of what a process is. A process is an instance of your application. The OS will assign it a chunk of virtual memory, execution context(program counter, registers, PID, …) and resource handles.

Read more

In this tutorial, we will take a look at events in C#. A class(subscriber class) can subscribe to an event of another class(publisher class). The publisher class notifies the subscriber class every time the event occurs. This works by using delegates. The subscriber will pass its delegate to the publisher class to “make a subscription” to its event. When the event occurs the publisher will call the delegate(callback method) that was provided to it by the subscriber when it “subscribed” to the event. This is how (for example button press event) events work in .NET. This principle of operation is also called the observer pattern.

Read more

In this tutorial, we will take a look at delagates in C#. A delegate is a pointer to a method(basically an indirect call to the method). Delegates can be passed as input parameters to other methods. A benefit of this is that it provides flexibility. Such a method can then use the passed in delegate to call another method(callback method). This is actually the way events work.

Read more

In this tutorial, we will see how to use the Open File Dialog in WFA C# apps. In this example, I will use a WFA application. If you just want to know how to create/read/write files check out this example with a console application.

Read more

In this tutorial, we will see how to write and read files in C#. In this example, I will use a console application. If you want to know how to open a file dialog and select/create a file in a WFA application see this post. For WPF applications see this post.

Read more

In this tutorial, we will see the difference between method hiding and overriding in C#. The difference between method hiding and method overriding becomes evident when a class object is used polymorphically. The child version of the method gets called only when the method is overridden. If the method is hidden(new keyword) the parent version of the method gets called. Meanwhile, if we don’t call a method polymorphically the new keyword will act in the same way as the override keyword does and hide the original parent implementation of the method.

Read more

In this tutorial, we will take a look at the using keyword in C#. The using keyword can be used as a directive to include a namespace or it can be used as a statement. Using it as a statement the using keyword ensures that the dispose() method gets called even if an exception occurs.

Read more

About In this code snippet, we will learn the basics of how to work with the console in C#. We will see how to write text to the console, read text from the console, change the …

Read more

In this tutorial, we will take a look at interfaces in C#. When I was first learning about interfaces I was given this analogy: “Interfaces are like contracts that specify what a class has to implement”. When a class uses an interface it must implement everything that the interface specifies.

Read more