Add conditional compilation for framework-specific code

Introduce framework-specific handling in `Static.cs` to support both NET and NETFRAMEWORK. Implement lazy initialization for service collection and provider, ensuring proper access and error handling.

DigitalData.Core.Infrastructure/Static.cs

@@ -0,0 +1,29 @@
+#if NETFRAMEWORK
+using System;
+#endif
+
+using Microsoft.Extensions.DependencyInjection;
+
+namespace DigitalData.Core.Infrastructure
+#if NET
+    ;
+#elif NETFRAMEWORK
+    {
+#endif
+
+public class Static
+{
+    private readonly static Lazy<IServiceCollection> LazyServices = new Lazy<IServiceCollection>(() => new ServiceCollection());
+
+    public static IServiceCollection Services => LazyProvider.IsValueCreated
+        ? LazyServices.Value 
+        : throw new InvalidOperationException("Service collection is not available after the service provider has been built.");
+
+    private static readonly Lazy<IServiceProvider> LazyProvider = new Lazy<IServiceProvider>(Services.BuildServiceProvider);
+
+    public static IServiceProvider Provider => LazyProvider.Value;
+}
+
+#if NETFRAMEWORK
+    }
+#endif