Refactor for .NET framework compatibility

Added preprocessor directives to conditionally include
code for different .NET frameworks. Adjusted namespace
declarations and organized the `Static` class for
improved clarity and maintainability.

DigitalData.Core.Infrastructure/Static.cs

@@ -1,37 +0,0 @@
-#if NETFRAMEWORK
-using System;
-#endif
-
-using DigitalData.Core.Abstraction.Application.Repository;
-using Microsoft.Extensions.DependencyInjection;
-
-namespace DigitalData.Core.Infrastructure
-#if NET
-    ;
-#elif NETFRAMEWORK
-    {
-#endif
-
-public static class Static
-{
-    private readonly static Lazy<IServiceCollection> LazyServices = new Lazy<IServiceCollection>(() => new ServiceCollection());
-
-    public static IServiceCollection Services => LazyProvider.IsValueCreated
-        ? LazyServices.Value
-        : throw new InvalidOperationException("Services cannot be accessed after the Provider has been created.");
-
-    private static readonly Lazy<IServiceProvider> LazyProvider = new Lazy<IServiceProvider>(Services.BuildServiceProvider);
-
-    public static IServiceProvider Provider => LazyProvider.Value;
-
-    public static IRepository Repository => Provider.GetRequiredService<IRepository>();
-}
-
-public static class Static<TEntity>
-{
-    public static IRepository<TEntity> Repository() => Static.Provider.GetRequiredService<IRepository<TEntity>>();
-}
-
-#if NETFRAMEWORK
-    }
-#endif