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Add an overload to UseSerilog() - Useful for configuring Serilog during the construction of IWebHost.
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‎samples/SimpleWebSampleV2/Controllers/ConfigurationController.cs

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// Copyright 2017 Serilog Contributors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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using System.Collections.Generic;
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using Microsoft.AspNetCore.Mvc;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.Logging;
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namespace SimpleWebSampleV2.Controllers
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{
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// This controller lists configuration settings and their value.
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// Please, do try to update the appsettings.json while the application is running. 😉
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[Route("api/[controller]")]
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public class ConfigurationController : Controller
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{
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public ConfigurationController(IConfiguration configuration, ILogger<ConfigurationController> logger)
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{
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Configuration = configuration;
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Logger = logger;
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}
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public IConfiguration Configuration { get; }
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public ILogger Logger { get; }
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[HttpGet]
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public IEnumerable<KeyValuePair<string, string>> Get()
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{
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Logger.LogInformation("Listing all configuration settings…");
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return Configuration.AsEnumerable();
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}
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[HttpGet("{key}")]
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public string Get(string key)
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{
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Logger.LogInformation("The configuration key {ConfigurationKey} was requested.", key);
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string value = Configuration[key];
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Logger.LogInformation("The configuration key {ConfigurationKey} has value {ConfigurationValue}.", key, value);
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return value;
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}
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}
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}

‎samples/SimpleWebSampleV2/Program.cs

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using System;
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using System.IO;
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using Microsoft.AspNetCore.Hosting;
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using Microsoft.Extensions.Configuration;
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using Serilog;
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namespace SimpleWebSampleV2
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{
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public class Program
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{
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public static void Main(string[] args)
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{
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var host = new WebHostBuilder()
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.UseKestrel()
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.UseContentRoot(Directory.GetCurrentDirectory())
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.ConfigureAppConfiguration
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(
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// Load the application configuration over the web host configuration.
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(hostingContext, configurationBuilder) =>
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{
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configurationBuilder
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.SetBasePath(hostingContext.HostingEnvironment.ContentRootPath)
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.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
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.AddJsonFile($"appsettings.{hostingContext.HostingEnvironment.EnvironmentName}.json", optional: true, reloadOnChange: true)
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.AddEnvironmentVariables();
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}
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)
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.UseSerilog
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(
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// Configure Serilog to be used as the logger for the whole application.
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(hostingContext, loggerConfiguration) => loggerConfiguration.ReadFrom.Configuration(hostingContext.Configuration)
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.Enrich.FromLogContext()
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.WriteTo.Console()
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)
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.UseIISIntegration()
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.UseStartup<Startup>()
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.Build();
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host.Run();
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}
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}
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}

‎samples/SimpleWebSampleV2/Properties/launchSettings.json

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{
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"iisSettings": {
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"windowsAuthentication": false,
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"anonymousAuthentication": true,
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"iisExpress": {
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"applicationUrl": "http://localhost:52009/",
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"sslPort": 0
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}
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},
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"profiles": {
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"IIS Express": {
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"commandName": "IISExpress",
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"launchBrowser": true,
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"launchUrl": "api/configuration/Greeting",
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"environmentVariables": {
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"ASPNETCORE_ENVIRONMENT": "Development"
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}
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},
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"SimpleWebSample": {
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"commandName": "Project",
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"launchBrowser": true,
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"launchUrl": "api/configuration/Greeting",
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"environmentVariables": {
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"ASPNETCORE_ENVIRONMENT": "Development"
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},
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"applicationUrl": "http://localhost:52010/"
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}
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}
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}

‎samples/SimpleWebSampleV2/SimpleWebSampleV2.csproj

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<Project Sdk="Microsoft.NET.Sdk.Web">
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<PropertyGroup>
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<TargetFramework>netcoreapp2.0</TargetFramework>
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</PropertyGroup>
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<ItemGroup>
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<ProjectReference Include="..\..\src\Serilog.AspNetCore\Serilog.AspNetCore.csproj" />
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</ItemGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.0" />
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<PackageReference Include="Serilog.Sinks.Console" Version="3.0.1" />
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<PackageReference Include="Serilog.Settings.Configuration" Version="2.4.0" />
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</ItemGroup>
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</Project>

‎samples/SimpleWebSampleV2/Startup.cs

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using Microsoft.AspNetCore.Builder;
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using Microsoft.AspNetCore.Hosting;
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using Microsoft.AspNetCore.Http;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.DependencyInjection;
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namespace SimpleWebSampleV2
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{
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public class Startup
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{
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public Startup(IConfiguration configuration)
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{
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Configuration = configuration;
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}
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public IConfiguration Configuration { get; }
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// This method gets called by the runtime. Use this method to add services to the container.
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public void ConfigureServices(IServiceCollection services)
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{
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services.AddMvc();
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}
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// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
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public void Configure(IApplicationBuilder app, IHostingEnvironment env)
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{
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if (env.IsDevelopment())
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{
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app.UseDeveloperExceptionPage();
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}
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app.UseMvc();
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}
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}
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}

‎samples/SimpleWebSampleV2/appsettings.Development.json

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{
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"Serilog": {
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"MinimumLevel": {
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"Default": "Debug"
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}
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}
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}

‎samples/SimpleWebSampleV2/appsettings.json

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{
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"Serilog": {
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"MinimumLevel": {
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"Default": "Debug",
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"Override": {
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"Microsoft": "Warning",
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"System": "Warning"
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}
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}
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},
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"Greeting": "Hello World !"
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}

‎serilog-aspnetcore.sln

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio 15
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VisualStudioVersion = 15.0.26730.10
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VisualStudioVersion = 15.0.26730.12
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{A1893BD1-333D-4DFE-A0F0-DDBB2FE526E0}"
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EndProject
@@ -24,6 +24,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Serilog.AspNetCore", "src\S
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Serilog.AspNetCore.Tests", "test\Serilog.AspNetCore.Tests\Serilog.AspNetCore.Tests.csproj", "{AD51759B-CD58-473F-9620-0B0E56A123A1}"
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SimpleWebSampleV2", "samples\SimpleWebSampleV2\SimpleWebSampleV2.csproj", "{2711EC78-7F7D-440B-A8AB-BA3D32227667}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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{AD51759B-CD58-473F-9620-0B0E56A123A1}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{AD51759B-CD58-473F-9620-0B0E56A123A1}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{AD51759B-CD58-473F-9620-0B0E56A123A1}.Release|Any CPU.Build.0 = Release|Any CPU
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{2711EC78-7F7D-440B-A8AB-BA3D32227667}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{2711EC78-7F7D-440B-A8AB-BA3D32227667}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{2711EC78-7F7D-440B-A8AB-BA3D32227667}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{2711EC78-7F7D-440B-A8AB-BA3D32227667}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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{69F9A0ED-7910-4F33-8919-28BB05376FBC} = {F2407211-6043-439C-8E06-3641634332E7}
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{0549D23F-986B-4FB2-BACE-16FD7A7BC9EF} = {A1893BD1-333D-4DFE-A0F0-DDBB2FE526E0}
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{AD51759B-CD58-473F-9620-0B0E56A123A1} = {E30F638E-BBBE-4AD1-93CE-48CC69CFEFE1}
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{2711EC78-7F7D-440B-A8AB-BA3D32227667} = {F2407211-6043-439C-8E06-3641634332E7}
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {811E61C5-3871-4633-AFAE-B35B619C8A10}

‎src/Serilog.AspNetCore/SerilogWebHostBuilderExtensions.cs

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collection.AddSingleton<ILoggerFactory>(new SerilogLoggerFactory(logger, dispose)));
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return builder;
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}
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/// <summary>Sets Serilog as the logging provider.</summary>
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/// <param name="builder">The web host builder to configure.</param>
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/// <param name="configureSerilog">The delegate for configuring the <see cref="LoggerConfiguration" /> that will be used to construct a <see cref="Logger" />.</param>
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/// <returns>The web host builder.</returns>
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public static IWebHostBuilder UseSerilog(this IWebHostBuilder builder, Action<WebHostBuilderContext, LoggerConfiguration> configureSerilog)
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{
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if (builder == null) throw new ArgumentNullException(nameof(builder));
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if (configureSerilog == null) throw new ArgumentNullException(nameof(configureSerilog));
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builder.ConfigureServices
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(
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(context, collection) =>
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{
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var loggerConfiguration = new LoggerConfiguration();
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configureSerilog(context, loggerConfiguration);
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collection.AddSingleton<ILoggerFactory>(new SerilogLoggerFactory(loggerConfiguration.CreateLogger(), true));
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}
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);
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return builder;
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}
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}
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}

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