Add asserts

Author: jkotas

src/coreclr/vm/appdomain.cpp

@@ -3988,6 +3988,8 @@ DomainAssembly* AppDomain::RaiseTypeResolveEventThrowing(DomainAssembly* pAssemb
 
     if (ResultingAssemblyRef != NULL)
     {
+        _ASSERTE(ResultingAssemblyRef->GetMethodTable()->CanCastToClass(CoreLibBinder::GetClass(CLASS__ASSEMBLY)));
+
         pResolvedAssembly = ResultingAssemblyRef->GetDomainAssembly();
 
         if (pResultingAssemblyRef)
@@ -4044,6 +4046,8 @@ Assembly* AppDomain::RaiseResourceResolveEvent(DomainAssembly* pAssembly, LPCSTR
     ASSEMBLYREF ResultingAssemblyRef = (ASSEMBLYREF) onResourceResolve.Call_RetOBJECTREF(args);
     if (ResultingAssemblyRef != NULL)
     {
+        _ASSERTE(ResultingAssemblyRef->GetMethodTable()->CanCastToClass(CoreLibBinder::GetClass(CLASS__ASSEMBLY)));
+
         pResolvedAssembly = ResultingAssemblyRef->GetAssembly();
         if (pResolvedAssembly->IsCollectible())
         {
@@ -4110,6 +4114,8 @@ AppDomain::RaiseAssemblyResolveEvent(
 
         if (ResultingAssemblyRef != NULL)
         {
+            _ASSERTE(ResultingAssemblyRef->GetMethodTable()->CanCastToClass(CoreLibBinder::GetClass(CLASS__ASSEMBLY)));
+
             pAssembly = ResultingAssemblyRef->GetAssembly();
             if (pAssembly->IsCollectible())
             {
@@ -4543,6 +4549,8 @@ HRESULT RuntimeInvokeHostAssemblyResolver(INT_PTR pManagedAssemblyLoadContextToB
             // If we are here, assembly was successfully resolved via Load or Resolving events.
             _ASSERTE(_gcRefs.oRefLoadedAssembly != NULL);
 
+            _ASSERTE(_gcRefs.oRefLoadedAssembly->GetMethodTable()->CanCastToClass(CoreLibBinder::GetClass(CLASS__ASSEMBLY)));
+
             // We were able to get the assembly loaded. Now, get its name since the host could have
             // performed the resolution using an assembly with different name.
             DomainAssembly *pDomainAssembly = _gcRefs.oRefLoadedAssembly->GetDomainAssembly();