├── .gitignore ├── CSharp9.sln ├── InitOnlyProperties ├── InitOnlyProperties.csproj └── Program.cs ├── NewExpressions ├── NewExpressions.csproj └── Program.cs ├── README.md ├── Records ├── Program.cs └── Records.csproj ├── TargetTyping ├── Program.cs └── TargetTyping.csproj └── global.json /.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 | *.rsuser 8 | *.suo 9 | *.user 10 | *.userosscache 11 | *.sln.docstates 12 | 13 | # User-specific files (MonoDevelop/Xamarin Studio) 14 | *.userprefs 15 | 16 | # Mono auto generated files 17 | mono_crash.* 18 | 19 | # Build results 20 | [Dd]ebug/ 21 | [Dd]ebugPublic/ 22 | [Rr]elease/ 23 | [Rr]eleases/ 24 | x64/ 25 | x86/ 26 | [Aa][Rr][Mm]/ 27 | [Aa][Rr][Mm]64/ 28 | bld/ 29 | [Bb]in/ 30 | [Oo]bj/ 31 | [Ll]og/ 32 | [Ll]ogs/ 33 | 34 | # Visual Studio 2015/2017 cache/options directory 35 | .vs/ 36 | # Uncomment if you have tasks that create the project's static files in wwwroot 37 | #wwwroot/ 38 | 39 | # Visual Studio 2017 auto generated files 40 | Generated\ Files/ 41 | 42 | # MSTest test Results 43 | [Tt]est[Rr]esult*/ 44 | [Bb]uild[Ll]og.* 45 | 46 | # NUnit 47 | *.VisualState.xml 48 | TestResult.xml 49 | nunit-*.xml 50 | 51 | # Build Results of an ATL Project 52 | [Dd]ebugPS/ 53 | [Rr]eleasePS/ 54 | dlldata.c 55 | 56 | # Benchmark Results 57 | BenchmarkDotNet.Artifacts/ 58 | 59 | # .NET Core 60 | project.lock.json 61 | project.fragment.lock.json 62 | artifacts/ 63 | 64 | # StyleCop 65 | StyleCopReport.xml 66 | 67 | # Files built by Visual Studio 68 | *_i.c 69 | *_p.c 70 | *_h.h 71 | *.ilk 72 | *.meta 73 | *.obj 74 | *.iobj 75 | *.pch 76 | *.pdb 77 | *.ipdb 78 | *.pgc 79 | *.pgd 80 | *.rsp 81 | *.sbr 82 | *.tlb 83 | *.tli 84 | *.tlh 85 | *.tmp 86 | *.tmp_proj 87 | *_wpftmp.csproj 88 | *.log 89 | *.vspscc 90 | *.vssscc 91 | .builds 92 | *.pidb 93 | *.svclog 94 | *.scc 95 | 96 | # Chutzpah Test files 97 | _Chutzpah* 98 | 99 | # Visual C++ cache files 100 | ipch/ 101 | *.aps 102 | *.ncb 103 | *.opendb 104 | *.opensdf 105 | *.sdf 106 | *.cachefile 107 | *.VC.db 108 | *.VC.VC.opendb 109 | 110 | # Visual Studio profiler 111 | *.psess 112 | *.vsp 113 | *.vspx 114 | *.sap 115 | 116 | # Visual Studio Trace Files 117 | *.e2e 118 | 119 | # TFS 2012 Local Workspace 120 | $tf/ 121 | 122 | # Guidance Automation Toolkit 123 | *.gpState 124 | 125 | # ReSharper is a .NET coding add-in 126 | _ReSharper*/ 127 | *.[Rr]e[Ss]harper 128 | *.DotSettings.user 129 | 130 | # TeamCity is a build add-in 131 | _TeamCity* 132 | 133 | # DotCover is a Code Coverage Tool 134 | *.dotCover 135 | 136 | # AxoCover is a Code Coverage Tool 137 | .axoCover/* 138 | !.axoCover/settings.json 139 | 140 | # Visual Studio code coverage results 141 | *.coverage 142 | *.coveragexml 143 | 144 | # NCrunch 145 | _NCrunch_* 146 | .*crunch*.local.xml 147 | nCrunchTemp_* 148 | 149 | # MightyMoose 150 | *.mm.* 151 | AutoTest.Net/ 152 | 153 | # Web workbench (sass) 154 | .sass-cache/ 155 | 156 | # Installshield output folder 157 | [Ee]xpress/ 158 | 159 | # DocProject is a documentation generator add-in 160 | DocProject/buildhelp/ 161 | DocProject/Help/*.HxT 162 | DocProject/Help/*.HxC 163 | DocProject/Help/*.hhc 164 | DocProject/Help/*.hhk 165 | DocProject/Help/*.hhp 166 | DocProject/Help/Html2 167 | DocProject/Help/html 168 | 169 | # Click-Once directory 170 | publish/ 171 | 172 | # Publish Web Output 173 | *.[Pp]ublish.xml 174 | *.azurePubxml 175 | # Note: Comment the next line if you want to checkin your web deploy settings, 176 | # but database connection strings (with potential passwords) will be unencrypted 177 | *.pubxml 178 | *.publishproj 179 | 180 | # Microsoft Azure Web App publish settings. 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Backup files are not needed, 246 | # because we have git ;-) 247 | _UpgradeReport_Files/ 248 | Backup*/ 249 | UpgradeLog*.XML 250 | UpgradeLog*.htm 251 | ServiceFabricBackup/ 252 | *.rptproj.bak 253 | 254 | # SQL Server files 255 | *.mdf 256 | *.ldf 257 | *.ndf 258 | 259 | # Business Intelligence projects 260 | *.rdl.data 261 | *.bim.layout 262 | *.bim_*.settings 263 | *.rptproj.rsuser 264 | *- [Bb]ackup.rdl 265 | *- [Bb]ackup ([0-9]).rdl 266 | *- [Bb]ackup ([0-9][0-9]).rdl 267 | 268 | # Microsoft Fakes 269 | FakesAssemblies/ 270 | 271 | # GhostDoc plugin setting file 272 | *.GhostDoc.xml 273 | 274 | # Node.js Tools for Visual Studio 275 | .ntvs_analysis.dat 276 | node_modules/ 277 | 278 | # Visual Studio 6 build log 279 | *.plg 280 | 281 | # Visual Studio 6 workspace options file 282 | *.opt 283 | 284 | # Visual Studio 6 auto-generated workspace file (contains which files were open etc.) 285 | *.vbw 286 | 287 | # Visual Studio LightSwitch build output 288 | **/*.HTMLClient/GeneratedArtifacts 289 | **/*.DesktopClient/GeneratedArtifacts 290 | **/*.DesktopClient/ModelManifest.xml 291 | **/*.Server/GeneratedArtifacts 292 | **/*.Server/ModelManifest.xml 293 | _Pvt_Extensions 294 | 295 | # Paket dependency manager 296 | .paket/paket.exe 297 | paket-files/ 298 | 299 | # FAKE - F# Make 300 | .fake/ 301 | 302 | # CodeRush personal settings 303 | .cr/personal 304 | 305 | # Python Tools for Visual Studio (PTVS) 306 | __pycache__/ 307 | *.pyc 308 | 309 | # Cake - Uncomment if you are using it 310 | # tools/** 311 | # !tools/packages.config 312 | 313 | # Tabs Studio 314 | *.tss 315 | 316 | # Telerik's JustMock configuration file 317 | *.jmconfig 318 | 319 | # BizTalk build output 320 | *.btp.cs 321 | *.btm.cs 322 | *.odx.cs 323 | *.xsd.cs 324 | 325 | # OpenCover UI analysis results 326 | OpenCover/ 327 | 328 | # Azure Stream Analytics local run output 329 | ASALocalRun/ 330 | 331 | # MSBuild Binary and Structured Log 332 | *.binlog 333 | 334 | # 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FALSE 75 | EndGlobalSection 76 | GlobalSection(ExtensibilityGlobals) = postSolution 77 | SolutionGuid = {C1A43501-5DEB-4129-B8C8-C2322E48589B} 78 | EndGlobalSection 79 | EndGlobal 80 | -------------------------------------------------------------------------------- /InitOnlyProperties/InitOnlyProperties.csproj: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | Exe 5 | net5.0 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /InitOnlyProperties/Program.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | 3 | namespace InitOnlyProperties 4 | { 5 | class Program 6 | { 7 | static void Main(string[] args) 8 | { 9 | //Declarações permitidas 10 | var pessoa = new Pessoa() 11 | { 12 | Nome = "André" 13 | }; 14 | 15 | var pessoa2 = new Pessoa("Renato"); 16 | 17 | Console.WriteLine("Init-Only"); 18 | Console.WriteLine("---------------------------------"); 19 | Console.WriteLine($"Nome da pessoa: {pessoa.Nome}"); 20 | Console.WriteLine($"Nome da pessoa: {pessoa2.Nome}"); 21 | Console.WriteLine(); 22 | 23 | //Operação não permitida 24 | //pessoa.Nome = "Renato"; 25 | } 26 | } 27 | 28 | public class Pessoa 29 | { 30 | public string Nome { get; init; } 31 | 32 | public Pessoa() { } 33 | 34 | public Pessoa(string nome) 35 | { 36 | Nome = nome; 37 | } 38 | } 39 | 40 | public class Carro 41 | { 42 | private readonly string _modelo; 43 | 44 | // Atribuição permitida 45 | public string Modelo 46 | { 47 | get => _modelo; 48 | init => _modelo = value; 49 | } 50 | 51 | // Atribuição não permitida (erro de compilação) 52 | public string Modelo2 53 | { 54 | get => _modelo; 55 | set => _modelo = value; 56 | } 57 | } 58 | } 59 | -------------------------------------------------------------------------------- /NewExpressions/NewExpressions.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net5.0 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /NewExpressions/Program.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | 3 | namespace NewExpressions 4 | { 5 | public class Program 6 | { 7 | static void Main(string[] args) 8 | { 9 | // Formas convêncionais 10 | Carro carro = new Carro("Honda", "WR-V", "AAA-1234", 79921); 11 | var carro1 = new Carro("Honda", "WR-V", "AAA-1234", 79921); 12 | 13 | // Nova possibilidade 14 | Carro carro2 = new ("Honda", "WR-V", "AAA-1234", 79921); 15 | 16 | Console.WriteLine("Carros:"); 17 | Console.WriteLine(carro.ToString()); 18 | Console.WriteLine(carro1.ToString()); 19 | Console.WriteLine(carro2.ToString()); 20 | } 21 | } 22 | 23 | public class Carro 24 | { 25 | public string Marca { get; set; } 26 | public string Modelo { get; set; } 27 | public string Placa { get; set; } 28 | public decimal Valor { get; set; } 29 | 30 | public Carro(string marca, string modelo, string placa, decimal valor) 31 | { 32 | Marca = marca; 33 | Modelo = modelo; 34 | Placa = placa; 35 | Valor = valor; 36 | } 37 | 38 | public override string ToString() => 39 | $"Marca: {Marca} | Modelo: {Modelo} | Placa: {Placa} | Valor: {Valor:C}"; 40 | } 41 | } 42 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # CSharp9 2 | Demos de alguns dos novos recursos do C# 9 3 | -------------------------------------------------------------------------------- /Records/Program.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | 3 | namespace Records 4 | { 5 | class Program 6 | { 7 | static void Main(string[] args) 8 | { 9 | // Comparação de records 10 | // Comparando dois registros criados com dados iguais 11 | var documento1 = new Documento 12 | { 13 | Numero = 123456 14 | }; 15 | 16 | var documento2 = new Documento 17 | { 18 | Numero = 123456 19 | }; 20 | 21 | var igual = documento1.Equals(documento2); 22 | Console.WriteLine("******* Value-based equality - Igualdade baseada em valor *******"); 23 | Console.WriteLine(); 24 | Console.WriteLine($"Comparação de objetos diferentes (do mesmo registro) com dados iguais: {igual}"); 25 | igual = documento1.GetHashCode().Equals(documento2.GetHashCode()); 26 | Console.WriteLine($"Comparação de Hash Codes de objetos diferentes (do mesmo registro) com dados iguais: {igual}"); 27 | 28 | // Comparação de records com herança 29 | // Comparando um registro criado pela registro base e outro criado pelo registro derivado 30 | var rg1 = new Documento 31 | { 32 | Numero = 123456 33 | }; 34 | 35 | var rg2 = new RG 36 | { 37 | Numero = 123456, 38 | OrgaoExpedidor = "SSP" 39 | }; 40 | 41 | igual = rg1.Equals(rg2); 42 | Console.WriteLine($"Comparação de objetos diferentes (registro base X registro derivado) com dados iguais: {igual}"); 43 | 44 | Console.WriteLine(); 45 | Console.WriteLine("******* Positional records - Registros Posicionais *******"); 46 | var previsaoTempo = new PrevisaoTempo(10.9m, 65.5m); 47 | var (temperatura, umidade) = previsaoTempo; 48 | Console.WriteLine($"Temperatura: {temperatura}ºC | Umidade: {umidade}%"); 49 | } 50 | } 51 | 52 | public record Documento 53 | { 54 | public long Numero { get; init; } 55 | } 56 | 57 | public record RG : Documento 58 | { 59 | public string OrgaoExpedidor { get; init; } 60 | } 61 | 62 | public record PrevisaoTempo 63 | { 64 | public decimal Temperatura { get; init; } 65 | public decimal Umidade { get; init; } 66 | 67 | public PrevisaoTempo(decimal temperatura, decimal umidade) => 68 | (Temperatura, Umidade) = (temperatura, umidade); 69 | 70 | public void Deconstruct(out decimal temperatura, out decimal umidade) => 71 | (temperatura, umidade) = (Temperatura, Umidade); 72 | } 73 | } 74 | -------------------------------------------------------------------------------- /Records/Records.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net5.0 6 | preview 7 | 8 | 9 | 10 | -------------------------------------------------------------------------------- /TargetTyping/Program.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Drawing; 3 | 4 | namespace TargetTyping 5 | { 6 | public class Program 7 | { 8 | static void Main(string[] args) 9 | { 10 | // Target Typed - New Expressions 11 | Point point = new(3, 5); 12 | 13 | Console.WriteLine($"New Expressions: X => {point.X} | Y => {point.Y}"); 14 | 15 | // Target Typing Conditional Operators 16 | 17 | // Nullable Value Types 18 | var resultado = 99; 19 | int? contador = resultado == 1 ? 0 : null; 20 | 21 | Console.WriteLine($"Nullable Value Types: {contador}"); 22 | 23 | 24 | //Shared Base Types 25 | Gato gato = null; 26 | Cachorro cachorro = new(); 27 | 28 | // OBS: Nesse preview (preview 8) ainda está acusando erro de compilação 29 | Animal animal = gato ?? cachorro; 30 | } 31 | } 32 | 33 | public class Animal { } 34 | 35 | public class Gato : Animal { } 36 | 37 | public class Cachorro : Animal { } 38 | } 39 | -------------------------------------------------------------------------------- /TargetTyping/TargetTyping.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net5.0 6 | preview 7 | 8 | 9 | 10 | -------------------------------------------------------------------------------- /global.json: -------------------------------------------------------------------------------- 1 | { 2 | "sdk": { 3 | "version": "5.0.100-preview.8.20417.9" 4 | } 5 | } --------------------------------------------------------------------------------