C# is one of the oldest and fast-growing programming languages in the world. This blog lists the top five features in C# 10 that help developers write code faster and prettier:
Let’s look at each of these features.
Note: With the details provided in the C# language versioning, C# 10 is supported only on .NET 6 and newer versions.
String interpolation, introduced in C# 6, provides an easy and convenient way to apply syntax to a string. An interpolated string is usually a combination of strings and an expression. On resolving an interpolated string to a string, the expression is executed, and the resultant string value is added in its place.
Back then, string interpolation was restricted only to strings, and a string declared as a constant cannot be interpolated. But now in C# 10, this string interpolation feature is extended to strings declared as constants as well, with the condition that only constant strings can be used in the expression.
Look at the following code example for more clarity.
const string Name = "Alan";
const string Designation = $"{Name} - Employee"; Extended property patterns help us to improve the readability of code in accessing a child property from a parent property. In C# versions prior to 10, the child properties were inaccessible at the same level.
{ ParentProperty: { ChildProperty: Value } } { ParentProperty.ChildProperty: Value } Use the new global using feature in the C# 10, to avoid referring to the same directive in each class and page. Adding the global modifier as a prefix to the using namespace or directive will apply the reference to all files in the project.
global using System;
With the new file-scoped namespace declaration in C# 10, you can declare a single namespace for the entire file. After declaring the file-scoped namespace, we can’t declare any other namespace. You can only declare and define the following types:
namespace ConsoleAppcore
{
internal class User
{
}
} namespace ConsoleAppcore;
internal class User
{
}
To use this feature in all the new classes to be created, follow these steps in Visual Studio 2022:
In the previous versions of C#, developers can either assign values to existing variables or declare new variables in deconstruction. The combination of assigning a value to an existing variable and declaring a new variable was restricted. This restriction is now removed, and you can assign a value and declare a new variable in a single deconstruction.
(string name, string email) = var employee; Or string name; string email; (name, email) = employee;
string name; (name, string email) = employee;
Thank you for reading this blog post. I hope you now have a good idea about the top five features in C# 10. Use these features when coding with C# 10 to make your code more readable and productive.
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