我正在为Segment/Analytics进行iOS绑定，并在此方面遇到了阻碍。
我无法找到一个好主意将oc代码转换为C#代码。

-(SEGReachability *)initWithReachabilityRef:(SCNetworkReachabilityRef)ref;

当我把代码转换成下面的：

[Export("initWithReachabilityRef:")]
        unsafe IntPtr Constructor(ref NetworkReachability @ref);

它发生了一个错误：

Error CS0311: The type SystemConfiguration.NetworkReachability' cannot be used as type parameterT' in the generic type or method ObjCRuntime.Runtime.GetNSObject<T>(System.IntPtr)'. There is no implicit reference conversion fromSystemConfiguration.NetworkReachability' to `Foundation.NSObject' (CS0311) (Anayltics.IOS)

    [Export ("initWithReachabilityRef:")]
    [CompilerGenerated]
    public SEGReachability (ref SCNetworkReachabilityRef @ref)
        : base (NSObjectFlag.Empty)
    {
        IntPtr @refValue = IntPtr.Zero;

        IsDirectBinding = GetType ().Assembly == global::ApiDefinition.Messaging.this_assembly;
        if (IsDirectBinding) {
            InitializeHandle (global::ApiDefinition.Messaging.IntPtr_objc_msgSend_ref_IntPtr (this.Handle, Selector.GetHandle ("initWithReachabilityRef:"), ref refValue), "initWithReachabilityRef:");
        } else {
            InitializeHandle (global::ApiDefinition.Messaging.IntPtr_objc_msgSendSuper_ref_IntPtr (this.SuperHandle, Selector.GetHandle ("initWithReachabilityRef:"), ref refValue), "initWithReachabilityRef:");
        }

        @ref = @refValue != IntPtr.Zero ? Runtime.GetNSObject<Anayltics.SCNetworkReachabilityRef> (@refValue) : null; //**--**error happened in this line.****
    }

谁能帮我？