Remove Slim dependency and adhere to Microsoft.Extensions standards

SystemExtensions.NetStandard.DependencyInjection/Extensions/ServiceCollectionExtensions.cs

@@ -0,0 +1,34 @@
+using Microsoft.Extensions.DependencyInjection;
+using System.Net.Http;
+using System.Net.WebSockets;
+
+namespace System.Extensions;
+
+public static class ServiceCollectionExtensions
+{
+    /// <summary>
+    /// Register a scoped <see cref="IHttpClient{TScope}"/> to be used by the DI engine.
+    /// </summary>
+    /// <typeparam name="T">Type of the scoped <see cref="IHttpClient{TScope}"/>.</typeparam>
+    /// <param name="services"><see cref="IServiceCollection"/>.</param>
+    /// <returns><see cref="HttpClientBuilder{T}"/> to build the http client.</returns>
+    public static HttpClientBuilder<T> RegisterHttpClient<T>(this IServiceCollection services)
+    {
+        services.ThrowIfNull(nameof(services));
+
+        return new HttpClientBuilder<T>(services);
+    }
+
+    /// <summary>
+    /// Register a scoped <see cref="IClientWebSocket{TScope}"/> to be used by the DI engine.
+    /// </summary>
+    /// <typeparam name="T">Type of the scoped <see cref="IClientWebSocket{TScope}"/>.</typeparam>
+    /// <param name="services"><see cref="IServiceCollection"/>.</param>
+    /// <returns><see cref="ClientWebSocketBuilder{T}"/> to build the websocket client.</returns>
+    public static ClientWebSocketBuilder<T> RegisterClientWebSocket<T>(this IServiceCollection services)
+    {
+        services.ThrowIfNull(nameof(services));
+
+        return new ClientWebSocketBuilder<T>(services);
+    }
+}