allow new items to be added to sub menus at runtime, from a config file

Hyperbar/Extensions/IServiceCollectionExtensions.cs

@@ -12,6 +12,8 @@ public static class IServiceCollectionExtensions
     public static IServiceCollection AddCache<TKey, TValue>(this IServiceCollection services)
         where TKey :
         notnull
+        where TValue :
+        notnull
     {
         services.AddScoped<ICache<TKey, TValue>, Cache<TKey, TValue>>();
         services.AddTransient(provider => provider.GetService<ICache<TKey, TValue>>()!.Select(x => x.Value));

Hyperbar/Lifecycles/Cache.cs

@@ -30,8 +30,10 @@ public class Cache<TValue>(IDisposer disposer) :
 
 public class Cache<TKey, TValue>(IDisposer disposer) :
     ICache<TKey, TValue>
-    where TKey : notnull
-    where TValue : notnull
+    where TKey :
+    notnull
+    where TValue :
+    notnull
 {
     private readonly ConcurrentDictionary<TKey, TValue> cache = new();
 
@@ -40,9 +42,13 @@ public class Cache<TKey, TValue>(IDisposer disposer) :
     {
         cache.TryAdd(key, value);
 
+        disposer.Add(value, Disposable.Create(() =>
+        {
+            Remove(key);
+        }));
+
         disposer.Add(key, Disposable.Create(() =>
         {
-            disposer.Dispose(value);
             Remove(key);
         }));
     }

Hyperbar/Lifecycles/ICache.cs

@@ -1,6 +1,4 @@
-using Microsoft.Extensions.DependencyInjection;
-
-namespace Hyperbar;
+namespace Hyperbar;
 
 public interface ICache<TValue> :
     IEnumerable<TValue>
@@ -14,7 +12,10 @@ public interface ICache<TValue> :
 
 public interface ICache<TKey, TValue> :
     IEnumerable<KeyValuePair<TKey, TValue>>
-    where TKey : notnull
+    where TKey :
+    notnull
+    where TValue : 
+    notnull
 {
     void Add(TKey key, 
         TValue value);

Hyperbar/Lifecycles/IFactory.cs

@@ -10,3 +10,15 @@ public interface IFactory<TService>
 {
     TService? Create();
 }
+
+
+public interface IProvider<TParameter, TService>
+{
+    TService? Get(TParameter value);
+}
+
+
+public interface IProvider<TService>
+{
+    TService? Get();
+}