Recently I was asked by a developer what this code block here actually is:

public Friend(string firstName, string middleName, string lastName)
  => (FirstName, MiddleName, LastName) = (firstName, middleName, lastName);

This is actually a constructor that uses an expression body and tuples.

In the previous blog posts you learned about different C# 9.0 features:

• Top-level statements
• Init-only properties
• Records
• Target-typed new expressions
• Improved Pattern Matching
• Pattern Matching in Switch Expressions

In this blog post, let's look at another very interesting feature of C# 9.0, the covariant return types.

In the previous blog posts about C# 9.0 you learned about different features:

• Top-level statements
• Init-only properties
• Records
• Target-typed new expressions
• Improved Pattern Matching

In this blog post, let's look at C# 9.0 pattern matching in switch expressions.

In the previous blog posts about C# 9.0 you learned about different features:

• Top-level statements
• Init-only properties
• Records
• Target-typed new expressions

In this blog post, let's look at another feature of C# 9.0, the improved pattern matching.

In the previous blog posts you learned about different C# 9.0 features:

• Top-level statements
• Init-only properties
• Records

In this blog post, let's look at another very interesting feature of C# 9.0 that is called target-typed new expressions.

In the previous blog posts you learned about different C# 9.0 features:

• Top-level statements
• Init-only properties

In this blog post, let's look at another very interesting feature of C# 9.0 that is called record types or just records.

In the previous blog post you learned about C# 9.0 top-level statements. In this blog post you learn about another C# 9.0 feature that is called init-only properties.

C# 9.0 introduces many new language features, and with this blog post I start a little series to look at some of those new features. Let's start in this post with top-level statements.

In the previous blog post you learned about different ways to do a null check. The traditional way is to use the == operator: