ExistingPartitionOptionsPartitionId Property

public int PartitionId { get; set; }

Public Property PartitionId As Integer
	Get
	Set

public:
property int PartitionId {
	int get ();
	void set (int value);
}

member PartitionId : int with get, set

Property Value

If the disk uses a default UEFI partition layout, Windows should be installed to partition 3. For the default BIOS partition layout, Windows should be installed to partition 2.

Since the default value of this property is zero, you must change it in order to generate a valid answer file.

Reference