gistfile1.txt

sealed class ArrayPart : Part
{
  readonly int myArrayLength;
  readonly object[] myArray;
  int myItemIndex;

  public ArrayPart(int arrayLength)
  {
    myArray = new object[arrayLength];
    myArrayLength = arrayLength;
    myItemIndex = 0;
  }

  public override object Value
  {
    get { return myArray; }
  }

  public override void PutMember(object value)
  {
    if (myItemIndex < myArrayLength)
    {
      myArray[myItemIndex] = value;
      myItemIndex++;
    }
  }
}

// =>

sealed class ArrayPart(int arrayLength) : Part
{
  readonly object[] myArray = new object[arrayLength];
  int myItemIndex = 0;

  public override object Value => myArray;

  public override void PutMember(object value)
  {
    if (myItemIndex < arrayLength)
    {
      myArray[myItemIndex] = value;
      myItemIndex++;
    }
  }
}