<PackageReference Include="Nito.Disposables" Version="2.5.0-alpha.2" />

System.Runtime.CompilerServices.NullableAttribute

sealed class NullableAttribute : Attribute
namespace System.Runtime.CompilerServices { internal sealed class NullableAttribute : Attribute { public readonly byte[] NullableFlags; public NullableAttribute(byte P_0); public NullableAttribute(byte[] P_0); } }