Add project files.

AspNetCore.Extensions/WebApplicationBuilderExtensions.cs

@@ -0,0 +1,34 @@
+using AspNetCore.Extensions.Attributes;
+using System.Core.Extensions;
+using System.Extensions;
+
+namespace AspNetCore.Extensions;
+
+public static class WebApplicationBuilderExtensions
+{
+    public static WebApplicationBuilder ConfigureExtended<TOptions>(this WebApplicationBuilder builder)
+        where TOptions : class, new()
+    {
+        builder.ThrowIfNull()
+               .Services.Configure<TOptions>(builder.Configuration.GetSection(GetOptionsName<TOptions>()));
+        return builder;
+    }
+
+    public static IConfigurationSection GetRequiredSection<TOptions>(this ConfigurationManager configurationManager)
+    {
+        configurationManager.ThrowIfNull();
+        return configurationManager.GetRequiredSection(GetOptionsName<TOptions>());
+    }
+
+    private static string GetOptionsName<TOptions>()
+    {
+        var maybeAttribute = typeof(TOptions).GetCustomAttributes(false).OfType<OptionsNameAttribute>().FirstOrDefault();
+        if (maybeAttribute is not null &&
+            maybeAttribute.Name?.IsNullOrWhiteSpace() is false)
+        {
+            return maybeAttribute.Name;
+        }
+
+        return typeof(TOptions).Name;
+    }
+}