https://learn.microsoft.com/en-us/dotnet/api/system.collections.immutable.immutableinterlocked.interlockedinitialize?view=dotnet-uwp-10.0&viewFallbackFrom=net-10.0-pp
ImmutableInterlocked.InterlockedInitializeT Method (System.Collections.Immutable) | Microsoft...
Sets an array to the specified array if the array has not been initialized.
methodsystemcollectionsimmutablemicrosoft