如何根据 if 条件以编程方式声明不同的 WCF 绑定类型？

using System.ServiceModel;

[ServiceBehavior(InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Multiple)]
public class MyService : IMyService
{
    // ...
}

using System.ServiceModel;
using System.ServiceModel.Channels;

[ServiceEndpoint(Binding = BindingDirection.InOut, Contract = "IMyService")]
public class MyServiceEndpoint : IMyServiceEndpoint
{
    public ChannelFactory<IMyService> ChannelFactory { get; set; }
}

using System.ServiceModel.Channels;

public class MyServiceChannelFactory : ChannelFactory<IMyService>
{
    public MyServiceChannelFactory(BindingContext context)
        : base(context)
    {
    }

    protected override System.ServiceModel.Channels.ChannelFactory<IMyService> CreateChannelFactory<TChannel>(BindingContext context)
    {
        return new MyServiceChannelFactory(context);
    }
}