ledpup

public class Base
{
    public virtual void Method()
    {
        Console.WriteLine("Base (can be overridden.)");
    }

    public void CantOverride()
    {
        Console.WriteLine("Can't be overridden (but can be newed).");

ledpup

class Range<T>
{
    public readonly T Start;
    public readonly T End;

    public Range(T start, T end)
    {
        Start = start;
        End = end;
    }