来自另一个应用程序域的 CreateInstance 适用于控制台应用程序，但在单元测试时抛出 MissingMethodException

Question

这是我为获得最小、完整和可验证的示例所能做的最好的（您可以 copy/paste 进行测试）：

考虑这两个类：

public class WorkerParam : MarshalByRefObject
{
    private readonly string s;

    public WorkerParam(string s)
    {
        this.s = s;
    }
}

public class Worker : MarshalByRefObject
{
    public WorkerParam T { get; }

    public Worker(WorkerParam t)
    {
        this.T = t;
    }
}

当运行来自控制台应用程序（4.5.2，AnyCPU）时效果很好：

class Program
{
    public static void Main()
    {
        Worker localWorker = new Worker(new WorkerParam("some string"));

        AppDomain ad = AppDomain.CreateDomain("New domain");

        Worker remoteWorker = (Worker)ad.CreateInstanceFromAndUnwrap(
            typeof(Worker).Assembly.Location,
            typeof(Worker).FullName,
            true,
            BindingFlags.Instance | BindingFlags.Public, null, new object[] { new WorkerParam("string") },
            CultureInfo.CurrentCulture, null);

        Console.ReadLine();
    }
}

相同的内容在单元测试时抛出 MissingMethodException（4.5.2，AnyCPU）：

[TestClass]
public class UnitTest1
{
    [TestMethod]
    public void TestMethod1()
    {
        Worker localWorker = new Worker(new WorkerParam("some string"));

        AppDomain ad = AppDomain.CreateDomain("New domain");

        // below line will throw MissingMethodException
        Worker remoteWorker = (Worker)ad.CreateInstanceFromAndUnwrap(
            typeof(Worker).Assembly.Location,
            typeof(Worker).FullName,
            true,
            BindingFlags.Instance | BindingFlags.Public, null, new object[] { new WorkerParam("string") },
            CultureInfo.CurrentCulture, null);
    }
}

问题是：当运行来自单元测试（Visual studio 单元）时 CreateInstanceFromAndUnwrap 将抛出 MissingMethodException 但在控制台应用程序上运行完美。

重要提示：当我从构造函数中删除参数 WorkerParam 时，它工作得很好。

Answer 1

您需要声明程序集的位置，因为您使用的不仅仅是 Worker 类型：

        AppDomainSetup domaininfo = new AppDomainSetup();
        domaininfo.ApplicationBase = System.Environment.CurrentDirectory;
        AppDomain ad = AppDomain.CreateDomain("New Domain", null, domaininfo);


        Worker remoteWorker = (Worker)ad.CreateInstanceFromAndUnwrap(
            typeof(Worker).Assembly.Location,
            typeof(Worker).FullName,
            true,
            BindingFlags.Instance | BindingFlags.Public,
            null,
            new object[] { new WorkerParam("string") },
            CultureInfo.CurrentCulture, null);

来自另一个应用程序域的 CreateInstance 适用于控制台应用程序，但在单元测试时抛出 MissingMethodException

CreateInstance from another appdomain works on console application but throws MissingMethodException when unit testing

.net

c#

unit-testing

appdomain

marshalling