var services = new ServiceCollection()
.AddScoped<IOperationScoped, Operation>()
.AddTransient<IOperationTransient, Operation>()
.AddSingleton<IOperationSingleton, Operation>();

接下來我們用ServiceProvider.CreateScope方法建立一個Scope

var provider = services.BuildServiceProvider();
using (var
 
 scope1 = provider.CreateScope())
{
    var p = scope1.ServiceProvider;

    var scopeobj1 = p.GetService<IOperationScoped>();
    var transient1 = p.GetService<IOperationTransient>();
    var singleton1 = p.GetService<IOperationSingleton>();

    var scopeobj2 = p.GetService<IOperationScoped>();
    var
 
 transient2 = p.GetService<IOperationTransient>();
    var singleton2 = p.GetService<IOperationSingleton>();

    Console.WriteLine(
        $"scope1: { scopeobj1.OperationId }," +
        $"transient1: {transient1.OperationId}, " +
        $"singleton1: {singleton1.OperationId}");

    Console.WriteLine($"scope2: { scopeobj2.OperationId }, "
 
 +
        $"transient2: {transient2.OperationId}, " +
        $"singleton2: {singleton2.OperationId}");
}