Determine if reflected property can be assigned null

Question

I wish to automagically discover some information on a provided class to do something akin to form entry. Specifically I am using reflection to return a PropertyInfo value f

Answer 1

PropertyInfo propertyInfo = ...
bool canAssignNull = 
    !propertyInfo.PropertyType.IsValueType || 
    propertyInfo.PropertyType.IsGenericType &&
        propertyInfo.PropertyType.GetGenericTypeDefinition() == typeof(Nullable<>)