Adjust broken code snippet and fix links (#5246)

aspnetcore/fundamentals/configuration/index.md

@@ -5,7 +5,7 @@ description: Use the Configuration API to configure an ASP.NET Core app by multi
 manager: wpickett
 ms.author: riande
 ms.custom: mvc
-ms.date: 1/11/2018
+ms.date: 01/11/2018
 ms.topic: article
 ms.technology: aspnet
 ms.prod: asp.net-core
@@ -45,7 +45,7 @@ The app reads and displays the following configuration settings:
 
 Configuration consists of a hierarchical list of name-value pairs in which the nodes are separated by a colon. To retrieve a value, access the `Configuration` indexer with the corresponding item's key:
 
-[!code-csharp[Main](index/sample/ConfigJson/Program.cs?range=24-24)]
+[!code-csharp[Main](index/sample/ConfigJson/Program.cs?range=21-22)]
 
 To work with arrays in JSON-formatted configuration sources, use an array index as part of the colon-separated string. The following example gets the name of the first item in the preceding `wizards` array:
 
@@ -54,7 +54,7 @@ Console.Write($"{Configuration["wizards:0:Name"]}");
 // Output: Gandalf
 ```
 
-Name-value pairs written to the built-in [Configuration](https://docs.microsoft.com/ dotnet/api/microsoft.extensions.configuration) providers are **not** persisted. However, you can create a custom provider that saves values. See [custom configuration provider](xref:fundamentals/configuration/index#custom-config-providers).
+Name-value pairs written to the built-in [Configuration](/dotnet/api/microsoft.extensions.configuration) providers are **not** persisted. However, you can create a custom provider that saves values. See [custom configuration provider](xref:fundamentals/configuration/index#custom-config-providers).
 
 The preceding sample uses the configuration indexer to read values. To access configuration outside of `Startup`, use the *options pattern*. For more information, see the [Options](xref:fundamentals/configuration/options) topic.
 
@@ -67,7 +67,7 @@ It's typical to have different configuration settings for different environments
 * *appsettings.\<EnvironmentName>.json*
 * Environment variables
 
-ASP.NET Core 1.x apps need to call `AddJsonFile` and [AddEnvironmentVariables](https://docs.microsoft.com/ dotnet/api/microsoft.extensions.configuration.environmentvariablesextensions.addenvironmentvariables #Microsoft_Extensions_Configuration_EnvironmentVariablesExtensions_AddEnvironmentVariables_Microsoft_Extensions_Configuration_IConfigurationBuilder_System_String_).
+ASP.NET Core 1.x apps need to call `AddJsonFile` and [AddEnvironmentVariables](/dotnet/api/microsoft.extensions.configuration.environmentvariablesextensions.addenvironmentvariables#Microsoft_Extensions_Configuration_EnvironmentVariablesExtensions_AddEnvironmentVariables_Microsoft_Extensions_Configuration_IConfigurationBuilder_System_String_).
 
 See [AddJsonFile](/dotnet/api/microsoft.extensions.configuration.jsonconfigurationextensions) for an explanation of the parameters. `reloadOnChange` is only supported in ASP.NET Core 1.1 and later.
 
@@ -101,7 +101,7 @@ Configuration values are returned as strings, but binding enables the constructi
 
 ### GetValue
 
-The following sample demonstrates the [GetValue&lt;T&gt;](https://docs.microsoft.com/aspnet/core/api/microsoft.extensions.configuration.configurationbinder#Microsoft_Extensions_Configuration_ConfigurationBinder_GetValue_Microsoft_Extensions_Configuration_IConfiguration_System_Type_System_String_System_Object_) extension method:
+The following sample demonstrates the [GetValue&lt;T&gt;](/dotnet/api/microsoft.extensions.configuration.configurationbinder.get?view=aspnetcore-2.0#Microsoft_Extensions_Configuration_ConfigurationBinder_Get__1_Microsoft_Extensions_Configuration_IConfiguration_) extension method:
 
 [!code-csharp[Main](index/sample/InMemoryGetValue/Program.cs?highlight=31)]
 
@@ -170,11 +170,11 @@ Add a `ConfigurationContext` to store and access the configured values:
 
 [!code-csharp[Main](index/sample/CustomConfigurationProvider/ConfigurationContext.cs?name=snippet1)]
 
-Create a class that implements [IConfigurationSource](https://docs.microsoft.com/aspnet/core/api/microsoft.extensions.configuration.iconfigurationsource):
+Create a class that implements [IConfigurationSource](/dotnet/api/Microsoft.Extensions.Configuration.IConfigurationSource):
 
 [!code-csharp[Main](index/sample/CustomConfigurationProvider/EntityFrameworkConfigurationSource.cs?highlight=7)]
 
-Create the custom configuration provider by inheriting from [ConfigurationProvider](https://docs.microsoft.com/aspnet/core/api/microsoft.extensions.configuration.configurationprovider). The configuration provider initializes the database when it's empty:
+Create the custom configuration provider by inheriting from [ConfigurationProvider](/dotnet/api/Microsoft.Extensions.Configuration.ConfigurationProvider). The configuration provider initializes the database when it's empty:
 
 [!code-csharp[Main](index/sample/CustomConfigurationProvider/EntityFrameworkConfigurationProvider.cs?highlight=9,18-31,38-39)]
 
@@ -396,7 +396,7 @@ A *web.config* file is required when hosting the app in IIS or IIS Express. Sett
 * `IConfiguration` has two specializations:
   * `IConfigurationRoot` Used for the root node. Can trigger a reload.
   * `IConfigurationSection` Represents a section of configuration values. The `GetSection` and `GetChildren` methods return an `IConfigurationSection`.
-  * Use [IConfigurationRoot](https://docs.microsoft.com/ dotnet/api/microsoft.extensions.configuration.iconfigurationroot) when reloading configuration or need access to each provider. Neither of these situations are common.
+  * Use [IConfigurationRoot](/dotnet/api/microsoft.extensions.configuration.iconfigurationroot) when reloading configuration or need access to each provider. Neither of these situations are common.
 
 ## Additional resources