Startup.cs

services.AddScoped<IFileStorageService>((serviceProvider) =>
{
    var env = serviceProvider.GetRequiredService<IWebHostEnvironment>();
    var configuration = serviceProvider.GetRequiredService<IConfiguration>();
    if (env.IsDevelopment())
    {
        var httpContextAccessor = serviceProvider.GetRequiredService<IHttpContextAccessor>();
        return new InAppStorageService(env, httpContextAccessor);
    }
    else
    {
        return new AzureStorageService(configuration);
    }
});