在Xamarin.Android？

Question

如何确定Xamarin.Android是否实际实现/支持.NETStandard API？我有一个在.NETStandard1.4库中实现的WCF net.tcp客户端。我从Xamarin.Android应用程序引用此库并尝试调用客户端方法。 它编译得很好，但在客户端方法调用上抛出NotImplementedException。

所以，Xamarin.Android并没有实现某些API，但仍然支持＆＃34; .NETStandard1.4？我问，因为我无法找到任何说它不受支持的内容，我想要使用的所有类/方法都记录在Xamarins在线文档中（例如https://developer.xamarin.com/api/type/System.ServiceModel.ClientBase%3CTChannel%3E/）并且没有提及＆＃34;未实现＆＃ 34;，但我得到了NotImplementedException。目前，我无法判断它是否真的不受支持，或者是否存在与我的安装/项目有关的事情。

如果是，那么.NETStandard库的目的究竟是什么，如果有人可以声称支持它并抛出NotImplementedException那么？

为了完整性：

Xamarin.Android app：

// MainActivity.cs
using Android.App;
using Android.Widget;
using Android.OS;
using System.ServiceModel;

namespace App1
{
    [Activity(Label = "App1", MainLauncher = true, Icon = "@drawable/icon")]
    public class MainActivity : Activity
    {
        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);

            // Set our view from the "main" layout resource
            // SetContentView (Resource.Layout.Main);
            var endpoint = new EndpointAddress("net.tcp://192.168.192.189:8550/iQOSApp_AppService");
            var binding = new NetTcpBinding(SecurityMode.None);
            var client = new iQOSApp.Clients.AppContractClient(binding, endpoint);
            int n = client.GetData(0); // NotImplementedException
        }
    }
}

.NETStandard Library：

// Clients.cs
//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by a tool.
//     Runtime Version:4.0.30319.42000
//
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------

namespace iQOSApp.Clients
{


    [System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "4.0.0.0")]
    [System.ServiceModel.ServiceContractAttribute(ConfigurationName = "iQOSApp.Clients.IAppContract")]
    public interface IAppContract
    {

        [System.ServiceModel.OperationContractAttribute(Action = "http://tempuri.org/IAppContract/GetData", ReplyAction = "http://tempuri.org/IAppContract/GetDataResponse")]
        int GetData(int value);

        [System.ServiceModel.OperationContractAttribute(Action = "http://tempuri.org/IAppContract/GetData", ReplyAction = "http://tempuri.org/IAppContract/GetDataResponse")]
        System.Threading.Tasks.Task<int> GetDataAsync(int value);
    }

    [System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "4.0.0.0")]
    public interface IAppContractChannel : iQOSApp.Clients.IAppContract, System.ServiceModel.IClientChannel
    {
    }

    [System.Diagnostics.DebuggerStepThroughAttribute()]
    [System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "4.0.0.0")]
    public partial class AppContractClient : System.ServiceModel.ClientBase<iQOSApp.Clients.IAppContract>, iQOSApp.Clients.IAppContract
    {

        public AppContractClient()
        {
        }

        public AppContractClient(string endpointConfigurationName) :
                base(endpointConfigurationName)
        {
        }

        public AppContractClient(string endpointConfigurationName, string remoteAddress) :
                base(endpointConfigurationName, remoteAddress)
        {
        }

        public AppContractClient(string endpointConfigurationName, System.ServiceModel.EndpointAddress remoteAddress) :
                base(endpointConfigurationName, remoteAddress)
        {
        }

        public AppContractClient(System.ServiceModel.Channels.Binding binding, System.ServiceModel.EndpointAddress remoteAddress) :
                base(binding, remoteAddress)
        {
        }

        public int GetData(int value)
        {
            return base.Channel.GetData(value);
        }

        public System.Threading.Tasks.Task<int> GetDataAsync(int value)
        {
            return base.Channel.GetDataAsync(value);
        }
    }
}