这发生在运行时，当我尝试将集合分配给 ItemsSource 时，程序声称引用了下面的方法但不存在。不知道发生了什么。
[] Missing method Cirrious.CrossCore.WeakSubscription.MvxWeakSubscriptionExtensionMethods::WeakSubscribe(INotifyCollectionChanged,EventHandler`1<NotifyCollectionChangedEventArgs>) in assembly /data/data/CraigsJobs.Application/files/.__override__/Cirrious.CrossCore.dll, referenced in assembly /data/data/CraigsJobs.Application/files/.__override__/Cirrious.MvvmCross.Binding.Droid.dll
[MvxBind] 1.01 Problem seen during binding execution for from Categories to ItemsSource - problem TargetInvocationException: Exception has been thrown by the target of an invocation.
这是完整的跟踪：
[] Missing method Cirrious.CrossCore.WeakSubscription.MvxWeakSubscriptionExtensionMethods::WeakSubscribe(INotifyCollectionChanged,EventHandler`1<NotifyCollectionChangedEventArgs>) in assembly /data/data/CraigsJobs.Application/files/.__override__/Cirrious.CrossCore.dll, referenced in assembly /data/data/CraigsJobs.Application/files/.__override__/Cirrious.MvvmCross.Binding.Droid.dll
[MvxBind] 1.01 Problem seen during binding execution for from Categories to ItemsSource - problem TargetInvocationException: Exception has been thrown by the target of an invocation.
[MvxBind] at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
[MvxBind] at System.Reflection.MonoProperty.SetValue (System.Object obj, System.Object value, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] index, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
[MvxBind] at System.Reflection.PropertyInfo.SetValue (System.Object obj, System.Object value, System.Object[] index) [0x00000] in <filename unknown>:0
[MvxBind] at Cirrious.MvvmCross.Binding.Bindings.Target.MvxPropertyInfoTargetBinding.SetValue (System.Object value) [0x00000] in <filename unknown>:0
[MvxBind] at Cirrious.MvvmCross.Binding.Bindings.MvxFullBinding.UpdateTargetFromSource (Boolean isAvailable, System.Object value) [0x00000] in <filename unknown>:0
[MvxBind] InnerException was MissingMethodException: Method not found: 'Cirrious.CrossCore.WeakSubscription.MvxWeakSubscriptionExtensionMethods.WeakSubscribe'.
[MvxBind] at Cirrious.MvvmCross.Binding.Droid.Views.MvxAdapter.set_ItemsSource (IEnumerable value) [0x00001] in d:\MVVMCross\MvvmCross\Cirrious\Cirrious.MvvmCross.Binding.Droid\Views\MvxAdapter.cs:71
[MvxBind] at Cirrious.MvvmCross.Binding.Droid.Views.MvxListView.set_ItemsSource (IEnumerable value) [0x00001] in d:\MVVMCross\MvvmCross\Cirrious\Cirrious.MvvmCross.Binding.Droid\Views\MvxListView.cs:56
[MvxBind] at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (System.Reflection.MonoMethod,object,object[],System.Exception&)
[MvxBind] at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
MvxBind:Error: 1.01 Problem seen during binding execution for from Categories to ItemsSource - problem TargetInvocationException: Exception has been thrown by the target of an invocation.
at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
at System.Reflection.MonoProperty.SetValue (System.Object obj, System.Object value, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] index, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
at System.Reflection.PropertyInfo.SetValue (System.Object obj, System.Object value, System.Object[] index) [0x00000] in <filename unknown>:0
at Cirrious.MvvmCross.Binding.Bindings.Target.MvxPropertyInfoTargetBinding.SetValue (System.Object value) [0x00000] in <filename unknown>:0
at Cirrious.MvvmCross.Binding.Bindings.MvxFullBinding.UpdateTargetFromSource (Boolean isAvailable, System.Object value) [0x00000] in <filename unknown>:0
InnerException was MissingMethodException: Method not found: 'Cirrious.CrossCore.WeakSubscription.MvxWeakSubscriptionExtensionMethods.WeakSubscribe'.
at Cirrious.MvvmCross.Binding.Droid.Views.MvxAdapter.set_ItemsSource (IEnumerable value) [0x00001] in d:\MVVMCross\MvvmCross\Cirrious\Cirrious.MvvmCross.Binding.Droid\Views\MvxAdapter.cs:71
at Cirrious.MvvmCross.Binding.Droid.Views.MvxListView.set_ItemsSource (IEnumerable value) [0x00001] in d:\MVVMCross\MvvmCross\Cirrious\Cirrious.MvvmCross.Binding.Droid\Views\MvxListView.cs:56
at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (System.Reflection.MonoMethod,object,object[],System.Exception&)
at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
[libEGL] loaded /system/lib/egl/libGLES_android.so
[libEGL] loaded /system/lib/egl/libEGL_emulation.so
[] HostConnection::get() New Host Connection established 0x987c8b8, tid 10935
[libEGL] loaded /system/lib/egl/libGLESv1_CM_emulation.so
[libEGL] loaded /system/lib/egl/libGLESv2_emulation.so
[EGL_emulation] eglSurfaceAttrib not implemented
[OpenGLRenderer] Enabling debug mode 0