SealedOverrideToString.cs

using System;

var o = new TypeA("FooBar", 42);
Console.WriteLine(o);

public abstract record BaseRecord(string Name)
{
    public sealed override string ToString() => Name;
}

public sealed record TypeA(string Name, int Parameter) : BaseRecord(Name);
public sealed record TypeB(string Name, double Parameter) : BaseRecord(Name);