@implements IDisposable

public void Dispose()
{
    MessageService.Notify -= OnNotify;
}

var myFile = File.OpenWrite("C:\temp\0asdask12.txt");
Thread.Create(o=>myFile.Write(Encoding.UTF-8.GetBytes(o.ToString())).Start(myBigObject);

S>var myFile = File.OpenWrite("C:\temp\0asdask12.txt");
S>Thread.Create(o=>myFile.Write(Encoding.UTF-8.GetBytes(o.ToString())).Start(myBigObject);
S>

var myFile = File.OpenWrite("C:\temp\0asdask12.txt");
Thread.Create(o=>
{
    try     { myFile.Write(Encoding.UTF-8.GetBytes(o.ToString()); }
    finally { myFile.Dispose(); }
}).Start(myBigObject);

_>>Тем не менее в спецификации C# деструкторы есть : https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/language-specification/classes#destructors

_NN>Ага. Повбивав би

Note: In an earlier version of this specification, what is now referred to as a “finalizer” was called a “destructor”. Experience has shown that the term “destructor” caused confusion and often resulted to incorrect expectations, especially to programmers knowing C++. In C++, a destructor is called in a determinate manner, whereas, in C#, a finalizer is not. To get determinate behavior from C#, one should use Dispose. end note

_NN>И ещё масла в огонь

Finalizers (historically referred to as destructors)