├── .gitignore ├── ConsoleApp6.sln ├── ConsoleApp6 ├── ConsoleApp6.csproj └── Program.cs └── LICENSE /.gitignore: -------------------------------------------------------------------------------- 1 | ## Ignore Visual Studio temporary files, build results, and 2 | ## files generated by popular Visual Studio add-ons. 3 | ## 4 | ## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore 5 | 6 | # User-specific files 7 | *.suo 8 | *.user 9 | *.userosscache 10 | *.sln.docstates 11 | 12 | # User-specific files (MonoDevelop/Xamarin Studio) 13 | *.userprefs 14 | 15 | # Build results 16 | [Dd]ebug/ 17 | [Dd]ebugPublic/ 18 | [Rr]elease/ 19 | [Rr]eleases/ 20 | x64/ 21 | x86/ 22 | bld/ 23 | [Bb]in/ 24 | [Oo]bj/ 25 | [Ll]og/ 26 | 27 | # Visual Studio 2015 cache/options directory 28 | .vs/ 29 | # Uncomment if you have tasks that create the project's static files in wwwroot 30 | #wwwroot/ 31 | 32 | # MSTest test Results 33 | [Tt]est[Rr]esult*/ 34 | [Bb]uild[Ll]og.* 35 | 36 | # NUNIT 37 | *.VisualState.xml 38 | TestResult.xml 39 | 40 | # Build Results of an ATL Project 41 | [Dd]ebugPS/ 42 | [Rr]eleasePS/ 43 | dlldata.c 44 | 45 | # .NET Core 46 | project.lock.json 47 | project.fragment.lock.json 48 | artifacts/ 49 | **/Properties/launchSettings.json 50 | 51 | *_i.c 52 | *_p.c 53 | *_i.h 54 | *.ilk 55 | *.meta 56 | *.obj 57 | *.pch 58 | *.pdb 59 | *.pgc 60 | *.pgd 61 | *.rsp 62 | *.sbr 63 | *.tlb 64 | *.tli 65 | *.tlh 66 | *.tmp 67 | *.tmp_proj 68 | *.log 69 | *.vspscc 70 | *.vssscc 71 | .builds 72 | *.pidb 73 | *.svclog 74 | *.scc 75 | 76 | # Chutzpah Test files 77 | _Chutzpah* 78 | 79 | # Visual C++ cache files 80 | ipch/ 81 | *.aps 82 | *.ncb 83 | *.opendb 84 | *.opensdf 85 | *.sdf 86 | *.cachefile 87 | *.VC.db 88 | *.VC.VC.opendb 89 | 90 | # Visual Studio profiler 91 | *.psess 92 | *.vsp 93 | *.vspx 94 | *.sap 95 | 96 | # TFS 2012 Local Workspace 97 | $tf/ 98 | 99 | # Guidance Automation Toolkit 100 | *.gpState 101 | 102 | # ReSharper is a .NET coding add-in 103 | _ReSharper*/ 104 | *.[Rr]e[Ss]harper 105 | *.DotSettings.user 106 | 107 | # JustCode is a .NET coding add-in 108 | .JustCode 109 | 110 | # TeamCity is a build add-in 111 | _TeamCity* 112 | 113 | # DotCover is a Code Coverage Tool 114 | *.dotCover 115 | 116 | # Visual Studio code coverage results 117 | *.coverage 118 | *.coveragexml 119 | 120 | # NCrunch 121 | _NCrunch_* 122 | .*crunch*.local.xml 123 | nCrunchTemp_* 124 | 125 | # MightyMoose 126 | *.mm.* 127 | AutoTest.Net/ 128 | 129 | # Web workbench (sass) 130 | .sass-cache/ 131 | 132 | # Installshield output folder 133 | [Ee]xpress/ 134 | 135 | # DocProject is a documentation generator add-in 136 | DocProject/buildhelp/ 137 | DocProject/Help/*.HxT 138 | DocProject/Help/*.HxC 139 | DocProject/Help/*.hhc 140 | DocProject/Help/*.hhk 141 | DocProject/Help/*.hhp 142 | DocProject/Help/Html2 143 | DocProject/Help/html 144 | 145 | # Click-Once directory 146 | publish/ 147 | 148 | # Publish Web Output 149 | *.[Pp]ublish.xml 150 | *.azurePubxml 151 | # TODO: Comment the next line if you want to checkin your web deploy settings 152 | # but database connection strings (with potential passwords) will be unencrypted 153 | *.pubxml 154 | *.publishproj 155 | 156 | # Microsoft Azure Web App publish settings. Comment the next line if you want to 157 | # checkin your Azure Web App publish settings, but sensitive information contained 158 | # in these scripts will be unencrypted 159 | PublishScripts/ 160 | 161 | # NuGet Packages 162 | *.nupkg 163 | # The packages folder can be ignored because of Package Restore 164 | **/packages/* 165 | # except build/, which is used as an MSBuild target. 166 | !**/packages/build/ 167 | # Uncomment if necessary however generally it will be regenerated when needed 168 | #!**/packages/repositories.config 169 | # NuGet v3's project.json files produces more ignorable files 170 | *.nuget.props 171 | *.nuget.targets 172 | 173 | # Microsoft Azure Build Output 174 | csx/ 175 | *.build.csdef 176 | 177 | # Microsoft Azure Emulator 178 | ecf/ 179 | rcf/ 180 | 181 | # Windows Store app package directories and files 182 | AppPackages/ 183 | BundleArtifacts/ 184 | Package.StoreAssociation.xml 185 | _pkginfo.txt 186 | 187 | # Visual Studio cache files 188 | # files ending in .cache can be ignored 189 | *.[Cc]ache 190 | # but keep track of directories ending in .cache 191 | !*.[Cc]ache/ 192 | 193 | # Others 194 | ClientBin/ 195 | ~$* 196 | *~ 197 | *.dbmdl 198 | *.dbproj.schemaview 199 | *.jfm 200 | *.pfx 201 | *.publishsettings 202 | orleans.codegen.cs 203 | 204 | # Since there are multiple workflows, uncomment next line to ignore bower_components 205 | # (https://github.com/github/gitignore/pull/1529#issuecomment-104372622) 206 | #bower_components/ 207 | 208 | # RIA/Silverlight projects 209 | Generated_Code/ 210 | 211 | # Backup & report files from converting an old project file 212 | # to a newer Visual Studio version. Backup files are not needed, 213 | # because we have git ;-) 214 | _UpgradeReport_Files/ 215 | Backup*/ 216 | UpgradeLog*.XML 217 | UpgradeLog*.htm 218 | 219 | # SQL Server files 220 | *.mdf 221 | *.ldf 222 | *.ndf 223 | 224 | # Business Intelligence projects 225 | *.rdl.data 226 | *.bim.layout 227 | *.bim_*.settings 228 | 229 | # Microsoft Fakes 230 | FakesAssemblies/ 231 | 232 | # GhostDoc plugin setting file 233 | *.GhostDoc.xml 234 | 235 | # Node.js Tools for Visual Studio 236 | .ntvs_analysis.dat 237 | node_modules/ 238 | 239 | # Typescript v1 declaration files 240 | typings/ 241 | 242 | # Visual Studio 6 build log 243 | *.plg 244 | 245 | # Visual Studio 6 workspace options file 246 | *.opt 247 | 248 | # Visual Studio 6 auto-generated workspace file (contains which files were open etc.) 249 | *.vbw 250 | 251 | # Visual Studio LightSwitch build output 252 | **/*.HTMLClient/GeneratedArtifacts 253 | **/*.DesktopClient/GeneratedArtifacts 254 | **/*.DesktopClient/ModelManifest.xml 255 | **/*.Server/GeneratedArtifacts 256 | **/*.Server/ModelManifest.xml 257 | _Pvt_Extensions 258 | 259 | # Paket dependency manager 260 | .paket/paket.exe 261 | paket-files/ 262 | 263 | # FAKE - F# Make 264 | .fake/ 265 | 266 | # JetBrains Rider 267 | .idea/ 268 | *.sln.iml 269 | 270 | # CodeRush 271 | .cr/ 272 | 273 | # Python Tools for Visual Studio (PTVS) 274 | __pycache__/ 275 | *.pyc 276 | 277 | # Cake - Uncomment if you are using it 278 | # tools/** 279 | # !tools/packages.config 280 | 281 | # Telerik's JustMock configuration file 282 | *.jmconfig 283 | 284 | # BizTalk build output 285 | *.btp.cs 286 | *.btm.cs 287 | *.odx.cs 288 | *.xsd.cs 289 | -------------------------------------------------------------------------------- /ConsoleApp6.sln: -------------------------------------------------------------------------------- 1 |  2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio 15 4 | VisualStudioVersion = 15.0.26730.8 5 | MinimumVisualStudioVersion = 10.0.40219.1 6 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ConsoleApp6", "ConsoleApp6\ConsoleApp6.csproj", "{8FB39C0E-1D84-474C-9445-6E4589C129B6}" 7 | EndProject 8 | Global 9 | GlobalSection(SolutionConfigurationPlatforms) = preSolution 10 | Debug|Any CPU = Debug|Any CPU 11 | Release|Any CPU = Release|Any CPU 12 | EndGlobalSection 13 | GlobalSection(ProjectConfigurationPlatforms) = postSolution 14 | {8FB39C0E-1D84-474C-9445-6E4589C129B6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 15 | {8FB39C0E-1D84-474C-9445-6E4589C129B6}.Debug|Any CPU.Build.0 = Debug|Any CPU 16 | {8FB39C0E-1D84-474C-9445-6E4589C129B6}.Release|Any CPU.ActiveCfg = Release|Any CPU 17 | {8FB39C0E-1D84-474C-9445-6E4589C129B6}.Release|Any CPU.Build.0 = Release|Any CPU 18 | EndGlobalSection 19 | GlobalSection(SolutionProperties) = preSolution 20 | HideSolutionNode = FALSE 21 | EndGlobalSection 22 | GlobalSection(ExtensibilityGlobals) = postSolution 23 | SolutionGuid = {002AD7A7-ECD1-4AB2-9E23-4C2B88A44A5B} 24 | EndGlobalSection 25 | EndGlobal 26 | -------------------------------------------------------------------------------- /ConsoleApp6/ConsoleApp6.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net6.0 6 | latest 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | -------------------------------------------------------------------------------- /ConsoleApp6/Program.cs: -------------------------------------------------------------------------------- 1 | using Microsoft.CodeAnalysis.CSharp.Scripting; 2 | using Microsoft.CodeAnalysis.Scripting; 3 | using System; 4 | using System.Collections.Generic; 5 | using System.IO; 6 | using System.Linq; 7 | using System.Linq.Expressions; 8 | using System.Net; 9 | using System.Security.Claims; 10 | using System.Threading.Tasks; 11 | 12 | namespace ConsoleApp6 13 | { 14 | class Program 15 | { 16 | public static async Task Main(string[] args) 17 | { 18 | Console.WriteLine("Roslyn approach:"); 19 | var discountFilter = "album => album.Quantity > 100"; 20 | var options = ScriptOptions.Default.AddReferences(typeof(Album).Assembly); 21 | Func discountFilterExpression = await CSharpScript.EvaluateAsync>(discountFilter, options); 22 | 23 | var albums = new List 24 | { 25 | new Album { Quantity = 10, Artist = "Betontod", Title = "Revolution" }, 26 | new Album { Quantity = 50, Artist = "The Dangerous Summer", Title = "The Dangerous Summer" }, 27 | new Album { Quantity = 200, Artist = "Depeche Mode", Title = "Spirit" }, 28 | }; 29 | 30 | var discountedAlbums = albums.Where(discountFilterExpression); 31 | 32 | foreach(var album in discountedAlbums) 33 | { 34 | Console.WriteLine($"Discounted album: {album.Artist} - {album.Title}"); 35 | } 36 | 37 | Console.WriteLine(); 38 | Console.WriteLine("****"); 39 | Console.WriteLine(); 40 | 41 | // approach with manual expression building 42 | Console.WriteLine("Manual expression building approach:"); 43 | var parameter = Expression.Parameter(typeof(Album), "album"); 44 | var comparison = Expression.GreaterThan(Expression.Property(parameter, Type.GetType("ConsoleApp6.Album").GetProperty("Quantity")), Expression.Constant(100)); 45 | var lambda = Expression.Lambda>(comparison, parameter).Compile(); 46 | var discountedAlbums2 = albums.Where(lambda); 47 | 48 | foreach (var album in discountedAlbums2) 49 | { 50 | Console.WriteLine($"Discounted album: {album.Artist} - {album.Title}"); 51 | } 52 | 53 | Console.ReadKey(); 54 | } 55 | } 56 | 57 | public class Album 58 | { 59 | public int Quantity { get; set; } 60 | public string Title { get; set; } 61 | public string Artist { get; set; } 62 | } 63 | } 64 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2018 Filip W 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | --------------------------------------------------------------------------------