<PackageReference Include="NETStandard.Library" Version="2.0.2" />

System.Threading.Mutex

public sealed class Mutex : WaitHandle
namespace System.Threading { public sealed class Mutex : WaitHandle { public Mutex(); public Mutex(bool initiallyOwned); public Mutex(bool initiallyOwned, string name); public Mutex(bool initiallyOwned, string name, out bool createdNew); public static Mutex OpenExisting(string name); public void ReleaseMutex(); public static bool TryOpenExisting(string name, out Mutex result); } }