Minor improvements to dependency injection example (#1)

* Update code example to align with snippet in CommandApp/DI documentation

* Renamed TypeRegistrar to MyTypeRegistrar, making it more obvious it is a custom class the user must provide.

examples/Cli/Injection/Infrastructure/MyTypeRegistrar.cs

@@ -4,18 +4,18 @@ using Spectre.Console.Cli;
 
 namespace Injection.Infrastructure;
 
-public sealed class TypeRegistrar : ITypeRegistrar
+public sealed class MyTypeRegistrar : ITypeRegistrar
 {
     private readonly IServiceCollection _builder;
 
-    public TypeRegistrar(IServiceCollection builder)
+    public MyTypeRegistrar(IServiceCollection builder)
     {
         _builder = builder;
     }
 
     public ITypeResolver Build()
     {
-        return new TypeResolver(_builder.BuildServiceProvider());
+        return new MyTypeResolver(_builder.BuildServiceProvider());
     }
 
     public void Register(Type service, Type implementation)

examples/Cli/Injection/Infrastructure/MyTypeResolver.cs

@@ -3,11 +3,11 @@ using Spectre.Console.Cli;
 
 namespace Injection.Infrastructure;
 
-public sealed class TypeResolver : ITypeResolver, IDisposable
+public sealed class MyTypeResolver : ITypeResolver, IDisposable
 {
     private readonly IServiceProvider _provider;
 
-    public TypeResolver(IServiceProvider provider)
+    public MyTypeResolver(IServiceProvider provider)
     {
         _provider = provider ?? throw new ArgumentNullException(nameof(provider));
     }

examples/Cli/Injection/Program.cs

@@ -9,11 +9,12 @@ public class Program
 {
     public static int Main(string[] args)
     {
-        // Create a type registrar and register any dependencies.
-        // A type registrar is an adapter for a DI framework.
         var registrations = new ServiceCollection();
         registrations.AddSingleton<IGreeter, HelloWorldGreeter>();
-        var registrar = new TypeRegistrar(registrations);
+
+        // Create a type registrar and register any dependencies.
+        // A type registrar is an adapter for a DI framework.
+        var registrar = new MyTypeRegistrar(registrations);
 
         // Create a new command app with the registrar
         // and run it with the provided arguments.