{
        bool isSolved = true; //Solve Variable
        foreach (TextBox tb in this.Controls.OfType<TextBox>()) //Iterates through all textboxes
        {
            if (tb.Text == null) //Checks to see if one of them is null
            {
                isSolved = false; //Sets bool to false
            }
        }
        return isSolved; //Returns bool
    }