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# C# 実行時に実行環境を判定する 2021-10-11

> [.NET] 実行時にOS・プラットフォーム等の実行環境による条件分岐をする
> https://zenn.dev/shimat/articles/78f855a978c188

> runtime/src/libraries/Common/tests/TestUtilities/System/PlatformDetection.cs
> https://github.com/dotnet/runtime/blob/57bfe474518ab5b7cfe6bf7424a79ce3af9d6657/src/libraries/Common/tests/TestUtilities/System/PlatformDetection.cs

> runtime/src/libraries/Common/tests/TestUtilities/System/PlatformDetection.Unix.cs
> https://github.com/dotnet/runtime/blob/49d88890b7d3971054e7a4026d2a508172b5d222/src/libraries/Common/tests/TestUtilities/System/PlatformDetection.Unix.cs

> runtime/src/libraries/Common/tests/TestUtilities/System/PlatformDetection.Windows.cs
> https://github.com/dotnet/runtime/blob/57bfe474518ab5b7cfe6bf7424a79ce3af9d6657/src/libraries/Common/tests/TestUtilities/System/PlatformDetection.Windows.cs

Console.WriteLine("OSPlatform.Windows   :" + RuntimeInformation.IsOSPlatform(OSPlatform.Windows));
Console.WriteLine("OSPlatform.OSX       :" + RuntimeInformation.IsOSPlatform(OSPlatform.OSX));
Console.WriteLine("OSPlatform.Linux     :" + RuntimeInformation.IsOSPlatform(OSPlatform.Linux));
#if NET
Console.WriteLine("OSPlatform.FreeBSD   :" + RuntimeInformation.IsOSPlatform(OSPlatform.FreeBSD));
#endif
Console.WriteLine("FrameworkDescription :" + RuntimeInformation.FrameworkDescription);
Console.WriteLine("OSDescription        :" + RuntimeInformation.OSDescription);
Console.WriteLine("OSArchitecture       :" + RuntimeInformation.OSArchitecture);

###### tags: `C#` `OS` `実行環境` `フレームワーク` `判定`