C#: Declaring and using a list of generic classes with different types, how?

Question

Having the following generic class that would contain either string, int, float, long as the type:

public class MyData         


        

Answer 1

Just use an ArrayList and forget the MyData type.

ArrayList myStuff = getStuff();
float x = myStuff.OfType().First();
SomeMethod(x);
string s = myStuff.OfType().First();
SomeMethod(s);

The problem with MyData is that you're expecting the compiler to check a type that is only known at runtime. Compilers check types that are known at compile time.