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C# Feature – File-scoped namespaces

Overview

Section titled “Overview”

Use a semicolon after namespace to scope the entire file, avoiding an extra block and indentation.

Introduced In

Section titled “Introduced In”

C# 10 (2021)

Before

Section titled “Before”
namespace MyApp
{
  class C {}
}

After

Section titled “After”
namespace MyApp;
class C {}

Gotchas & Best Practices

Section titled “Gotchas & Best Practices”
  • One file-scoped namespace per file.