Describe: Abstract factory demo to build a house to be specified. Small but perfectly formed.

File list(Click to check if it's the file you need, and recomment it at the bottom):
  HouseFactory\HouseFactory\bin\Debug\HouseFactory.exe
  ............\............\...\.....\HouseFactory.pdb
  ............\............\...\.....\HouseFactory.vshost.exe
  ............\............\...\.....\HouseFactory.vshost.exe.manifest
  ............\............\HouseFactory.csproj
  ............\............\obj\Debug\HouseFactory.csproj.FileListAbsolute.txt
  ............\............\...\.....\HouseFactory.exe
  ............\............\...\.....\HouseFactory.pdb
  ............\............\Program.cs
  ............\............\...perties\AssemblyInfo.cs
  ............\............\产品类.cs
  ............\............\工厂类.cs
  ............\HouseFactory.sln
  ............\HouseFactory.suo
  ............\............\obj\Debug\TempPE
  ............\............\bin\Debug
  ............\............\obj\Debug
  ............\............\bin
  ............\............\obj
  ............\............\Properties
  ............\HouseFactory
  HouseFactory