01简单工厂模式
..............\计算器
..............\......\Operation
..............\......\.........\bin
..............\......\.........\...\Debug
..............\......\.........\...\.....\Operation.dll
..............\......\.........\...\.....\Operation.pdb
..............\......\.........\obj
..............\......\.........\...\Debug
..............\......\.........\...\.....\Operation.dll
..............\......\.........\...\.....\Operation.pdb
..............\......\.........\...\.....\TempPE
..............\......\.........\...\Operation.csproj.FileList.txt
..............\......\.........\Operation.cs
..............\......\.........\Operation.csproj
..............\......\.........\Properties
..............\......\.........\..........\AssemblyInfo.cs
..............\......\OperationLibrary
..............\......\................\bin
..............\......\................\...\Debug
..............\......\................\...\.....\OperationLibrary.dll
..............\......\................\...\.....\OperationLibrary.pdb
..............\......\................\obj
..............\......\................\...\Debug
..............\......\................\...\.....\OperationLibrary.dll
..............\......\................\...\.....\OperationLibrary.pdb
..............\......\................\...\.....\Refactor
..............\......\................\...\.....\........\OperationLibrary.dll
..............\......\................\...\.....\TempPE
..............\......\................\...\OperationLibrary.csproj.FileList.txt
..............\......\................\Operation.cs
..............\......\................\OperationLibrary.csproj
..............\......\................\Properties
..............\......\................\..........\AssemblyInfo.cs
..............\......\计算器
..............\......\......\bin
..............\......\......\...\Debug
..............\......\......\...\.....\OperationLibrary.dll
..............\......\......\...\.....\OperationLibrary.pdb
..............\......\......\...\.....\计算器.exe
..............\......\......\...\.....\计算器.pdb
..............\......\......\...\.....\计算器.vshost.exe
..............\......\......\ClassDiagram1.cd
..............\......\......\Form1.cs
..............\......\......\Form1.Designer.cs
..............\......\......\Form1.resx
..............\......\......\obj
..............\......\......\...\Debug
..............\......\......\...\.....\Refactor
..............\......\......\...\.....\ResolveAssemblyReference.cache
..............\......\......\...\.....\TempPE
..............\......\......\...\.....\......\Properties.Resources.Designer.cs.dll
..............\......\......\...\.....\计算器.csproj.GenerateResource.Cache
..............\......\......\...\.....\计算器.exe
..............\......\......\...\.....\计算器.Form1.resources
..............\......\......\...\.....\计算器.pdb
..............\......\......\...\.....\计算器.Properties.Resources.resources
..............\......\......\...\计算器.csproj.FileList.txt
..............\......\......\Program.cs
..............\......\......\Properties
..............\......\......\..........\AssemblyInfo.cs
..............\......\......\..........\Resources.Designer.cs
..............\......\......\..........\Resources.resx
..............\......\......\..........\Settings.Designer.cs
..............\......\......\..........\Settings.settings
..............\......\......\计算器.csproj
..............\......\计算器.sln
..............\......\计算器控制台
..............\......\............\bin
..............\......\............\...\Debug
..............\......\............\...\.....\OperationLibrary.dll
..............\......\............\...\.....\OperationLibrary.pdb
..............\......\............\...\.....\计算器控制台.exe
..............\......\............\...\.....\计算器控制台.pdb
..............\......\............\...\.....\计算器控制台.vshost.exe
..............\......\............\obj
..............\......\............\...\Debug
..............\......\............\...\.....\Refactor
..............\......\............\...\.....\ResolveAsse