├── .gitattributes ├── .gitignore ├── CSharp10Demo.sln └── CSharp10Demo ├── AnonymousWithExpressions.cs ├── CSharp10Demo.csproj ├── ConstInterpolatedStrings.cs ├── FileLevelNamespaces.cs ├── GlobalUsings.cs ├── NullParameterChecking.cs ├── Program.cs └── SemiAutoProperties.cs /.gitattributes: -------------------------------------------------------------------------------- 1 | ############################################################################### 2 | # Set default behavior to automatically normalize line endings. 3 | ############################################################################### 4 | * text=auto 5 | 6 | ############################################################################### 7 | # Set default behavior for command prompt diff. 8 | # 9 | # This is need for earlier builds of msysgit that does not have it on by 10 | # default for csharp files. 11 | # Note: This is only used by command line 12 | ############################################################################### 13 | #*.cs diff=csharp 14 | 15 | ############################################################################### 16 | # Set the merge driver for project and solution files 17 | # 18 | # Merging from the command prompt will add diff markers to the files if there 19 | # are conflicts (Merging from VS is not affected by the settings below, in VS 20 | # the diff markers are never inserted). Diff markers may cause the following 21 | # file extensions to fail to load in VS. An alternative would be to treat 22 | # these files as binary and thus will always conflict and require user 23 | # intervention with every merge. To do so, just uncomment the entries below 24 | ############################################################################### 25 | #*.sln merge=binary 26 | #*.csproj merge=binary 27 | #*.vbproj merge=binary 28 | #*.vcxproj merge=binary 29 | #*.vcproj merge=binary 30 | #*.dbproj merge=binary 31 | #*.fsproj merge=binary 32 | #*.lsproj merge=binary 33 | #*.wixproj merge=binary 34 | #*.modelproj merge=binary 35 | #*.sqlproj merge=binary 36 | #*.wwaproj merge=binary 37 | 38 | ############################################################################### 39 | # behavior for image files 40 | # 41 | # image files are treated as binary by default. 42 | ############################################################################### 43 | #*.jpg binary 44 | #*.png binary 45 | #*.gif binary 46 | 47 | ############################################################################### 48 | # diff behavior for common document formats 49 | # 50 | # Convert binary document formats to text before diffing them. This feature 51 | # is only available from the command line. Turn it on by uncommenting the 52 | # entries below. 53 | ############################################################################### 54 | #*.doc diff=astextplain 55 | #*.DOC diff=astextplain 56 | #*.docx diff=astextplain 57 | #*.DOCX diff=astextplain 58 | #*.dot diff=astextplain 59 | #*.DOT diff=astextplain 60 | #*.pdf diff=astextplain 61 | #*.PDF diff=astextplain 62 | #*.rtf diff=astextplain 63 | #*.RTF diff=astextplain 64 | -------------------------------------------------------------------------------- /.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 | [Ww][Ii][Nn]32/ 27 | [Aa][Rr][Mm]/ 28 | [Aa][Rr][Mm]64/ 29 | bld/ 30 | [Bb]in/ 31 | [Oo]bj/ 32 | [Oo]ut/ 33 | [Ll]og/ 34 | [Ll]ogs/ 35 | 36 | # Visual Studio 2015/2017 cache/options directory 37 | .vs/ 38 | # Uncomment if you have tasks that create the project's static files in wwwroot 39 | #wwwroot/ 40 | 41 | # Visual Studio 2017 auto generated files 42 | Generated\ Files/ 43 | 44 | # MSTest test Results 45 | [Tt]est[Rr]esult*/ 46 | [Bb]uild[Ll]og.* 47 | 48 | # NUnit 49 | *.VisualState.xml 50 | TestResult.xml 51 | nunit-*.xml 52 | 53 | # Build Results of an ATL Project 54 | [Dd]ebugPS/ 55 | [Rr]eleasePS/ 56 | dlldata.c 57 | 58 | # Benchmark Results 59 | BenchmarkDotNet.Artifacts/ 60 | 61 | # .NET Core 62 | project.lock.json 63 | project.fragment.lock.json 64 | artifacts/ 65 | 66 | # ASP.NET Scaffolding 67 | ScaffoldingReadMe.txt 68 | 69 | # StyleCop 70 | StyleCopReport.xml 71 | 72 | # Files built by Visual Studio 73 | *_i.c 74 | *_p.c 75 | *_h.h 76 | *.ilk 77 | *.meta 78 | *.obj 79 | *.iobj 80 | *.pch 81 | *.pdb 82 | *.ipdb 83 | *.pgc 84 | *.pgd 85 | *.rsp 86 | *.sbr 87 | *.tlb 88 | *.tli 89 | *.tlh 90 | *.tmp 91 | *.tmp_proj 92 | *_wpftmp.csproj 93 | *.log 94 | *.vspscc 95 | *.vssscc 96 | .builds 97 | *.pidb 98 | *.svclog 99 | *.scc 100 | 101 | # Chutzpah Test files 102 | _Chutzpah* 103 | 104 | # Visual C++ cache files 105 | ipch/ 106 | *.aps 107 | *.ncb 108 | *.opendb 109 | *.opensdf 110 | *.sdf 111 | *.cachefile 112 | *.VC.db 113 | *.VC.VC.opendb 114 | 115 | # Visual Studio profiler 116 | *.psess 117 | *.vsp 118 | *.vspx 119 | *.sap 120 | 121 | # Visual Studio Trace Files 122 | *.e2e 123 | 124 | # TFS 2012 Local Workspace 125 | $tf/ 126 | 127 | # Guidance Automation Toolkit 128 | *.gpState 129 | 130 | # ReSharper is a .NET coding add-in 131 | _ReSharper*/ 132 | *.[Rr]e[Ss]harper 133 | *.DotSettings.user 134 | 135 | # TeamCity is a build add-in 136 | _TeamCity* 137 | 138 | # DotCover is a Code Coverage Tool 139 | *.dotCover 140 | 141 | # AxoCover is a Code Coverage Tool 142 | .axoCover/* 143 | !.axoCover/settings.json 144 | 145 | # Coverlet is a free, cross platform Code Coverage Tool 146 | coverage*.json 147 | coverage*.xml 148 | coverage*.info 149 | 150 | # Visual Studio code coverage results 151 | *.coverage 152 | *.coveragexml 153 | 154 | # NCrunch 155 | _NCrunch_* 156 | .*crunch*.local.xml 157 | nCrunchTemp_* 158 | 159 | # MightyMoose 160 | *.mm.* 161 | AutoTest.Net/ 162 | 163 | # Web workbench (sass) 164 | .sass-cache/ 165 | 166 | # Installshield output folder 167 | [Ee]xpress/ 168 | 169 | # DocProject is a documentation generator add-in 170 | DocProject/buildhelp/ 171 | DocProject/Help/*.HxT 172 | DocProject/Help/*.HxC 173 | DocProject/Help/*.hhc 174 | DocProject/Help/*.hhk 175 | DocProject/Help/*.hhp 176 | DocProject/Help/Html2 177 | DocProject/Help/html 178 | 179 | # Click-Once directory 180 | publish/ 181 | 182 | # Publish Web Output 183 | *.[Pp]ublish.xml 184 | *.azurePubxml 185 | # Note: Comment the next line if you want to checkin your web deploy settings, 186 | # but database connection strings (with potential passwords) will be unencrypted 187 | *.pubxml 188 | *.publishproj 189 | 190 | # Microsoft Azure Web App publish settings. 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8 | 9 | class AnonymousWithExpressions 10 | { 11 | public void TestMethod() 12 | { 13 | //Implementation using records in C# 9.0 14 | var dog = new Animal("Charlie", "Dog", 7); 15 | 16 | var cat = dog with { Type = "Cat" }; 17 | 18 | Console.WriteLine(cat.Name); //Charlie 19 | 20 | 21 | //Implementation in C# 10.0 22 | var dog = new { Name = "Max", Type = "Dog", Age = 10 }; 23 | 24 | var cat = dog with { Type = "Cat" }; 25 | } 26 | } 27 | } 28 | -------------------------------------------------------------------------------- /CSharp10Demo/CSharp10Demo.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | net5.0 6 | preview 7 | 8 | 9 | 10 | -------------------------------------------------------------------------------- /CSharp10Demo/ConstInterpolatedStrings.cs: -------------------------------------------------------------------------------- 1 | namespace CSharp10Demo 2 | { 3 | public class ConstInterpolatedStrings 4 | { 5 | public const string Greeting = "Hello "; 6 | public const string Title = "Ms. "; 7 | public const string LastName = "Keating"; 8 | 9 | public const string Salutation 10 | = $"{Greeting}, {Title}{LastName}!"; 11 | } 12 | } 13 | -------------------------------------------------------------------------------- /CSharp10Demo/FileLevelNamespaces.cs: -------------------------------------------------------------------------------- 1 | //NOTE: This will not compile at the moment, since file-level namespaces is not included 2 | //in the C# 10 preview at publishing time. 3 | //However, this file will give you an idea of how this feature might work when C# 10 is available. 4 | 5 | namespace CSharp10Demo; 6 | 7 | public class MyClass 8 | { 9 | public void MyMethod() 10 | { 11 | //...Method implementation 12 | } 13 | } -------------------------------------------------------------------------------- /CSharp10Demo/GlobalUsings.cs: -------------------------------------------------------------------------------- 1 | global using System; 2 | global using System.Collections.Generic; 3 | global using System.Linq; 4 | global using System.Threading.Tasks; 5 | 6 | //These using statements will now be included in every C# file in this project. -------------------------------------------------------------------------------- /CSharp10Demo/NullParameterChecking.cs: -------------------------------------------------------------------------------- 1 | //NOTE: Microsoft decided not to include this feature in C# 10's release. I'll keep it here to keep my post consistent, 2 | //but know that this feature is not available in C# 10. 3 | 4 | namespace CSharp10Demo 5 | { 6 | public class MyCustomClass { } 7 | 8 | public class NullParameterCheckCurrentImplementation 9 | { 10 | public string FormatName(string name) 11 | { 12 | if (name == null) 13 | return "Error"; 14 | //...Rest of implementation 15 | return string.Empty; 16 | } 17 | 18 | public void FormatCustomClass(MyCustomClass customClass) 19 | { 20 | if (customClass == null) 21 | return; 22 | //...Rest of implementation 23 | } 24 | } 25 | 26 | public class NullParameterCheckNewImplementation 27 | { 28 | public string FormatName(string name!) 29 | { 30 | //...Rest of implementation 31 | return string.Empty; 32 | } 33 | 34 | public void FormatCustomClass(MyCustomClass customClass!) 35 | { 36 | //...Rest of implementation 37 | } 38 | } 39 | } 40 | -------------------------------------------------------------------------------- /CSharp10Demo/Program.cs: -------------------------------------------------------------------------------- 1 | namespace CSharp10Demo 2 | { 3 | class Program 4 | { 5 | static void Main(string[] args) 6 | { 7 | Console.WriteLine("Hello World!"); 8 | } 9 | } 10 | } 11 | -------------------------------------------------------------------------------- /CSharp10Demo/SemiAutoProperties.cs: -------------------------------------------------------------------------------- 1 | //NOTE: Microsoft decided not to include this feature in C# 10's release. I'll keep it here to keep my post consistent, 2 | //but know that this feature is not available in C# 10. 3 | 4 | namespace CSharp10Demo 5 | { 6 | public class EmployeeCurrentImplementation 7 | { 8 | private DateTime _hireDate; 9 | 10 | public DateTime HireDate 11 | { 12 | get 13 | { 14 | return _hireDate; 15 | } 16 | set 17 | { 18 | _hireDate = value.Date; 19 | } 20 | } 21 | } 22 | 23 | public class EmployeeNewImplementation 24 | { 25 | public DateTime HireDate { get; set => field = value.Date; } 26 | } 27 | 28 | public class Customer 29 | { 30 | public DateTime DateOfVisit { get; init => field = value.Date; } 31 | } 32 | } 33 | --------------------------------------------------------------------------------