public override int GetHashCode()
{
unchecked
{
var hashCode = (_rows != null ? _rows.GetHashCode() : 0);
hashCode = (hashCode * 397) ^ (_columns != null ? _columns.GetHashCode() : 0);
hashCode = (hashCode * 397) ^ (_squares != null ? _squares.GetHashCode() : 0);
return(hashCode);
}
}