/// <summary>
/// Stream the field from a buffer
/// </summary>
/// <param name="er"></param>
public override void Read(IO.EndianReader er)
{
if (this.fieldType == FieldType.ByteBlockIndex) Value = er.ReadSByte();
else if (this.fieldType == FieldType.ShortBlockIndex) Value = er.ReadInt16();
else if (this.fieldType == FieldType.LongBlockIndex) Value = er.ReadInt32();
}