C# Blog - usage tips, C# upcoming features, performance benchmarks etc.

How to output the Ratio column when using BenchmarkDotNet

If you’re using BenchmarkDotNet and want to see how other methods compare against a baseline method, set the Baseline attribute … Continue reading How to output the Ratio column when using BenchmarkDotNet

The using static directive was introduced in C# 6 and allows us to omit the type name when calling static … Continue reading Omit type name when calling static methods with the using static directive in C#

In C# we can use aliases to provide shorthand references to types or namespaces. Aliases can be useful to tidy … Continue reading Using aliases in C# to provide shorthand references to types or namespaces

Does anyone actually use this variation of declaring variables? I rarely see it. I think its possibly useful in instances … Continue reading Declaring and setting multiple variables of the same type in the same statement in C#

The benchmarks (originally published on LinkedIn) below from Guilherme Ferreira show’s that there’s a big performance difference between using ToString() and … Continue reading ToString() v nameof() performance comparison when getting a string value from a enum option

If you’ve created long strings using string interpolation ($) and hit enter to prevent horizontal scroll Visual Studio will + … Continue reading Breaking up long interpolated strings can impact performance in .NET 6

FYI… setting capacity on a List<> when creating it can avoid a lot of expensive resizing operations. Even if we … Continue reading Set List<> initial capacity to improve speed

In C# if you’re referencing property, class or namespace names in your code use the nameof() expression rather than strings … Continue reading In C# use the nameof() expression so your property, class and namespace references are type safe

In C# Math.Clamp is a helpful method if you need to force a value to stay within a particular inclusive … Continue reading In C# use Math.Clamp to force a number between a particular inclusive range

When using StringBuilder in .NET most of times we likely just use the default constructor StringBuilder()… BUT if we have … Continue reading StringBuilder performance can be improved in C# by setting its capacity

Since there’s been so many amazing performance improvements in .NET 6 I thought it would be fun to compare different … Continue reading .NET 6 string concatenation performance benchmarks

C#9 (released Nov 2020) has some pattern matching enhancements. Added in C#9 (among other pattern changes) is conjunctive patterns (AND … Continue reading C#9 new AND, OR, NOT pattern matching keywords

Microsofts Indices and Ranges page provides examples of the indices and range syntax available in C# (introduced in C#8). This syntax … Continue reading Using C# indices and range syntax to access elements in a sequence

If you’re using Resharper, Roslynator or similar you’ll likely see string comparisons using ToLower() or ToUpper() flagged. Why are these … Continue reading Using ToLower() or ToUpper() in C# to compare strings is not safe in all cultures

Don’t use the var keyword everywhere in your code base just to be consistent. If using var removes clarity for … Continue reading Don’t use the C# var keyword everywhere in your code just to be consistent

C# 9 shipped with .NET 5 in November. One change included is init only properties which allow us to have … Continue reading Easier immutability with Init only properties in C# 9

.NET doesn’t use Newtonsoft by default anymore (since .NET Core 3.0). A lot of the examples online show how to use … Continue reading Parsing a nested value from a JSON string in .NET Core 3 without needing a DTO

Using a non sequential GUID in either a clustered or non clustered index is not ideal from a performance point … Continue reading Generating sequential GUIDs which sort correctly in SQL Server in .net

C# will automatically convert numbers which are of type float, double or decimal and have a lot of precision (lots … Continue reading Converting numbers to strings without scientific notation in C#

I would always favour typing more code to make it more explicit, more readable and to ensure consistency in style … Continue reading Discouraging use of the var keyword and ternary if operator