NStandard ports parts of .NET Core for use within the .NET Framework.
| Namespace | Class or Strcut | Compatibility |
|---|---|---|
| System | HashCode | = .NET Framework < .NET Standard 2.1 < .NET Core App 2.1 |
| System | ITuple | < .NET Framework 4.7 < .NET Standard 2.1 < .NET Core App 2.0 |
| System | Tuple | < .NET Framework 4.5.1 |
| System | FormattableString | < .NET Framework 4.6 < .NET Standard 1.3 |
| System.Collections | IStructuralComparable IStructuralEquatable |
< .NET Framework 4.5.1 |
| System.Reflection | CustomAttributeExtensions | < .NET Framework 4.5.1 |