2 errors pls help

Unity Engine
1

Error 1:

Assets/Scripts/Terrain/ChunkSaver.cs(4,40): error CS0234: The type or namespace name `TCP' does not exist in the namespace `System.Runtime.Remoting.Channels'. Are you missing an assembly reference?

Code 1:

using System.Runtime.Remoting.Channels.TCP;

Error 2:

Assets/Scripts/Terrain/ChunkSaver.cs(6,7): error CS0246: The type or namespace name `Remoting' could not be found. Are you missing a using directive or an assembly reference?

Code 2;

using Remoting;
2

Well TCP is not a member of System.Runtime.Remoting.Channels so that’s the first error

also Remoting is not a valid Namespace either for the second error.

Maybe they are not in the Mono implementation?