Creating C# form calculater




File list:
1stFormsApp
..........\bin
..........\...\Debug
..........\...\.....\1stFormsApp.exe
..........\...\.....\1stFormsApp.exe.config
..........\...\.....\1stFormsApp.pdb
..........\...\.....\1stFormsApp.vshost.exe
..........\...\.....\1stFormsApp.vshost.exe.config
..........\...\Release
..........\obj
..........\...\Debug
..........\...\.....\TempPE
..........\...\.....\1stFormsApp.csproj.FileListAbsolute.txt
..........\...\.....\1stFormsApp.csproj.GenerateResource.Cache
..........\...\.....\1stFormsApp.csprojResolveAssemblyReference.cache
..........\...\.....\1stFormsApp.exe
..........\...\.....\1stFormsApp.pdb
..........\...\.....\DesignTimeResolveAssemblyReferences.cache
..........\...\.....\DesignTimeResolveAssemblyReferencesInput.cache
..........\...\.....\TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs
..........\...\.....\TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs
..........\...\.....\TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs
..........\...\.....\_1stFormsApp.Form1.resources
..........\...\.....\_1stFormsApp.Properties.Resources.resources
..........\Properties
..........\..........\AssemblyInfo.cs
..........\..........\Resources.Designer.cs
..........\..........\Resources.resx
..........\..........\Settings.Designer.cs
..........\..........\Settings.settings
..........\1stFormsApp.csproj
..........\App.config
..........\Form1.cs
..........\Form1.Designer.cs
..........\Form1.resx
..........\Program.cs
1stFormsApp.sln