Tag Archives: syntax

Compare performance looping over DateTime and integer variables in C#

Posted on August 14, 2017 by Rod Stephens

The example Find Friday the Thirteenths in C# doesn’t really worry about performance. It uses integers to loop over the dates within a range. For every year between the start and end dates, the code considers the 13th of each … Continue reading →

Posted in performance, syntax | Tagged C#, C# programming, date loop, dates, DateTime, example, example program, Friday the 13th, Friday the Thirteenth, integer, loop, loop over dates, performance, syntax, Windows Forms programming | Leave a comment

Find Friday the Thirteenths in C#

Posted on August 11, 2017 by Rod Stephens

The following code shows how this example lists the Friday the Thirteenths between selected start and end dates. // List Friday the 13ths between the start and end dates. private void btnGo_Click(object sender, EventArgs e) { lstResults.Items.Clear(); // Get the … Continue reading →

Posted in performance, syntax | Tagged C#, C# programming, dates, DateTime, example, example program, Friday the 13th, Friday the Thirteenths, loop over dates, performance, syntax, Windows Forms programming | 1 Comment

Use == and != to compare structs in C#

Posted on August 11, 2017 by Rod Stephens

This example shows how you can overload the == and != operators to make it easier to compare structs. By default, for reference types (classes), == returns true if two references refer to the same object (reference equality). It returns … Continue reading →

Posted in operators, syntax | Tagged !=, ==, C#, C# programming, compare structs, compare structures, Equals, example, example program, GetHashCode, operator overloading, operators, overloading, structs, syntax, Windows Forms programming | Leave a comment

Create a class outside of any namespace statement in C#

Posted on July 15, 2017 by Rod Stephens

When you create a class in C#, Visual Studio automatically puts it inside a namespace statement. If your project’s name is howto_remove_namespace, then by default that namespace is howto_remove_namespace. But did you know that you can create classes outside of … Continue reading →

Posted in classes, syntax | Tagged C#, C# programming, classes, example, example program, namespace, syntax, Windows Forms programming | 2 Comments

Iterate over the items in arrays and lists in C#

Posted on July 3, 2017 by Rod Stephens

You can use a foreach loop to iterate over the items in arrays, lists, collections, and other objects that have a GetEnumerator method. These loops are often more convenient than for or while loops because you don’t need to worry … Continue reading →

Posted in arrays, lists, syntax | Tagged arrays, C#, C# programming, collections, enumerate, example, example program, foreach, iterate, lists, loop, syntax, Windows Forms programming | Leave a comment

Understand the @ symbol in C#

Posted on June 17, 2017 by Rod Stephens

The @ symbol can be pretty confusing for some C# developers. I’ve even known a few who have been programming for quite a while but who still have incorrect assumptions about what @ does. In your code (and only in … Continue reading →

Posted in strings, syntax | Tagged @ symbol, C#, C# programming, example, example program, literal, string literal, strings, syntax, underscore, Windows Forms programming | 1 Comment

Understand when a finally block is executed in C#

Posted on June 16, 2017 by Rod Stephens

Many programmers don’t understand (and many have forgotten) how the try catch finally block works. The basic syntax is: try { // Statements that could cause an error… } catch (Exception ex) { // Statements to execute if there is … Continue reading →

Posted in syntax | Tagged C#, C# programming, catch, error handler, error handling, example, example program, finally, finally block, syntax, try catch, try catch finally, Windows Forms programming | Leave a comment

Compare the performance of incrementing statements in C#

Posted on March 28, 2017 by Rod Stephens

This is another performance testing post. Assembly language usually has statements comparable to x++, x–, x +=, and other operators that add or subtract to a value and store the result in the same value, so it makes some sense … Continue reading →

Posted in performance, syntax | Tagged ++, +=, C#, C# programming, example, example program, increment, performance, syntax, Windows Forms programming | Leave a comment

Give a class default indexer properties in C#

Posted on March 20, 2017 by Rod Stephens

An indexer property is a property that other code can use inside square brackets to access some value provided by the class, much as you can use the index of an array. Unlike an array, a class’s indexer need not … Continue reading →

Posted in arrays, classes, syntax | Tagged arrays, C#, C# programming, classes, default property, example, example program, indexer property, syntax, Windows Forms programming | Leave a comment

Understand string equality testing in C#

Posted on February 28, 2017 by RodStephens

To really understand this example, you need to know about string interning, equality testing, and operator overloading. Interning First, interning. To save space, .NET uses an intern pool to store literal strings at compile time. If the program contains a … Continue reading →