Generic list of generic objects

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Yes, generics is a good choice. The key to achieving type-safety (and being identify the type with the Type property is to add an abstraction between the list and Field<T> class.

Have Field<T> implement the interface IField. This interface doesn’t need any members.

Then declare your list as being List<IField>.

That way you constrain the list to only contain fields, but each field can be of a different type.

To then read the values later, just do

foreach(var field in list)
{
    var type = field.Type;
    ....
}

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