// compile time
new List<MyStruct1>();
new List<MyClass1>();

...

// run time, for a function that does typeof(List<>).GetGenericTypeDef or whatever
InstantiateList<MyStruct2>(); // Mono on AOT platforms blows up because there was no reference to List<MyStruct2>
InstantiateList<MyClass2>();  // No JITing, Mono is fine even though there was no reference to List<MyClass2>