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| Visual C# Technical Guru - November 2018 |
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| Visual Studio 2019: Start Window |
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| Startup Options |
using System.Diagnostics; using System.Reflection; internal class StartupHook { public static void Initialize() { Debug.WriteLine($"{Assembly.GetExecutingAssembly().GetName().Name} is called."); } }
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| ENVIRONMENT VARIABLE |
DOTNET_STARTUP_HOOKS=SomePath\StartupHook1.dll;SomePath\StartupHook2.dll
public static void Main(string[] args) { Debug.WriteLine("Main is called."); CreateWebHostBuilder(args).Build().Run(); }
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| Debug Output |
class Program { static void Main(string[] args) { Employee employee = null; Console.WriteLine(employee.Name); } } class Employee { public string Name { get; set; } }
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| C# 7.3 (Visual Studio 15.9.3) |
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| C# 8.0 (Visual Studio 16.0.0 Preview 1.0) |
<NullableReferenceTypes>true</NullableReferenceTypes>
#nullable enable #nullable disable
Employee? employee = null;
Console.WriteLine(employee?.Name);
public string? Name { get; set; }
class Program { static void Main(string[] args) { Employee? employee = null; // some code Console.WriteLine(employee.Name); } } class Employee { public string? Name { get; set; } }
Console.WriteLine(employee!.Name);
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| ]Visual C# Technical Guru - October 2018 |
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| ASP.NET Technical Guru - October 2018 |
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| Visual Studio About |
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| .NET Core Options |
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| Visual Studio About |
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| .NET Core Options |
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| TNWiki Article Spotlight - Blazor: CRUD Using MongoDB |
services .AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme) .AddCookie(CookieAuthenticationDefaults.AuthenticationScheme, x => { // other configuration
x.Cookie.SecurePolicy = CookieSecurePolicy.SameAsRequest; x.Cookie.SameSite = SameSiteMode.None; })
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| Matrix |
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| Visual C# Technical Guru - September 2018 |
public class MemoryCache : IDisposable, Microsoft.Extensions.Caching.Memory.IMemoryCache
public class MemoryCache : System.Runtime.Caching.ObjectCache, IDisposable
public void ConfigureServices(IServiceCollection services) { services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1); services.AddMemoryCache(); }
public IMemoryCache _memoryCache { get; } public ValuesController(IMemoryCache memoryCache) { _memoryCache = memoryCache; }
[HttpGet] public ActionResult<IEnumerable<string>> Get() { string key = "Somekey"; if (!_memoryCache.TryGetValue(key, out DateTime cacheValue)) { cacheValue = DateTime.Now; var cacheEntryOptions = new MemoryCacheEntryOptions() .SetSlidingExpiration(TimeSpan.FromSeconds(30)); _memoryCache.Set(key, cacheValue, cacheEntryOptions); } return new string[] { $"Cached: { cacheValue.ToString()}", $"Actual: { DateTime.Now.ToString()}" }; }
# From the folder which contains UnitTests.csproj file dotnet add package coverlet.msbuild # If the folder contains multiple .csproj files, specify the targetted .csproj file dotnet add <MyProject.UnitTests.csproj>package coverlet.msbuild
dotnet test <MyProject.UnitTests.csproj>/p:CollectCoverage=true
dotnet test <MyProject.UnitTests.csproj>/p:CollectCoverage=true /p:CopyLocalLockFileAssemblies=true
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| Code Coverage |
dotnet tool install --global dotnet-dev-certs --version 2.1.1
dotnet dev-certs https -ep localhost.pfx -p dev
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dotnet dev-certs
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dotnet dev-certs https --help
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| dotnet dev-certs https --help |
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| Keychain Access |
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| Keychain Access |
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| Visual C# Technical Guru - August 2018 |
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| Permission Denied |
sudo lsof -i ':80'
sudo /Applications/Rider\ 2018.2.app/Contents/MacOS/rider
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| run as sudo |
docker run --name redis -p 6379:6379 redis
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| docker run |
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| Image |
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| Container |
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| docker run |
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| docker ps |
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| TNWiki Article Spotlight – ASP.NET Core Blazor Master/Detail CRUD with Filtering and Sorting using EF and Web API |
public interface IMyService { Guid GetGuid(); }
public class MyService : IMyService { private readonly Guid guid; public MyService() { guid = Guid.NewGuid(); } public Guid GetGuid() { return guid; } }
public class HelloWorldMiddleware { private readonly RequestDelegate _next; private readonly IMyService _myService; public HelloWorldMiddleware(RequestDelegate next, IMyService myService) { _next = next; _myService = myService; } public async Task Invoke(HttpContext httpContext) { await httpContext.Response.WriteAsync($"Hello World with {_myService.GetGuid()}"); } }
public class Startup { public Startup(IConfiguration configuration) { Configuration = configuration; } public IConfiguration Configuration { get; } public void ConfigureServices(IServiceCollection services) { // Rest of the code ignored for brevity // Registering IMyService as Transient // Meaning a new instance is created each time it’s requested services.AddTransient<IMyService, MyService>(); } public void Configure(IApplicationBuilder app, IHostingEnvironment env) { // Rest of the code ignored for brevity // Setting the custom middleware to the pipeline app.Map("/api/helloworld", configuration => { configuration.UseMiddleware<HelloWorldMiddleware>(); }); } }
public class HelloWorldMiddleware { private readonly RequestDelegate _next; public HelloWorldMiddleware(RequestDelegate next) { _next = next; } public async Task Invoke(HttpContext httpContext) { IMyService _myService = httpContext.RequestServices.GetService<IMyService>(); await httpContext.Response.WriteAsync($"Hello World with {_myService.GetGuid()}"); } }
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| Visual C# Technical Guru - July 2018 |
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| ASP.NET Core 2.2 |
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| Cleaned Up Templates |
# escape=` # The escape directive sets the character used to escape and it's used both to escape characters in a line, # and to escape a newline. Below we have some commands spanning across multiple lines, so we need this. # Note: It needs to be menioned before anything, yes, even before a comment. FROM microsoft/dotnet:2.1.2-aspnetcore-runtime-nanoserver-sac2016 # The default shell on Windows is ["cmd", "/S", "/C"], Changing to PowerShell SHELL["powershell", "-Command", "$ErrorActionPreference = 'Stop';"] # Current Node LTS Version as of 07/08/2018 ENV NODE_VERSION 8.11.3 # Make sure to use the SHA of the specified Node version ENV NODE_VERSION_SHA 91b779def1b21dcd1def7fc9671a869a1e2f989952e76fdc08a5d73570075f31 # PowerShell commands to download and extract RUN Invoke-WebRequest https://nodejs.org/dist/v$Env:NODE_VERSION/node-v$Env:NODE_VERSION-win-x64.zip -OutFile node.zip; ` if ((Get-FileHash node.zip -Algorithm sha256).Hash -ne $Env:NODE_VERSION_SHA) { ` Write-Host 'CHECKSUM VERIFICATION FAILED!'; ` exit 1; ` }; ` ` Expand-Archive node.zip -DestinationPath node-temp; ` Move-Item node-temp/node-v$Env:NODE_VERSION-win-x64 $Env:ProgramFiles/nodejs; ` Remove-Item -Force node.zip; ` Remove-Item -Force node-temp # Setting Node to Path RUN setx /M PATH $($Env:PATH + ';' + $Env:ProgramFiles + '/nodejs') # Next steps is omitted
function buildAddress(...addressLines) { return addressLines.join(", "); };
function buildAddress(...addressLines: string[]) { return addressLines.join(", "); };
console.log(buildAddress("111-2222", "Bing Street", "Springfield Gardens", "NY", "33333")); // 111-2222, Bing Street, Springfield Gardens, NY, 33333 console.log(buildAddress("111-2222", "Springfield Gardens", "NY", "33333")); // 111-2222, Springfield Gardens, NY, 33333
console.log(buildAddress());