How to pass an unknown class to a method with properties in c#?

Question

OOP

An example of how you can pass an unknown class to a method.

public static void ReadData<T>() where T : new(){
T i = new T();
}

And this is not how it works anymore.

public static void ReadData<T>() where T : new(){
T i = new T{
params1 = "hello"
};
}

How to be in such a situation?

Answer 1

Pass not a class but an interface.

Answer 2

Use dictionaries and store parameters there with text keys.