public int CalculateOhmValue(ColorCode band1, ColorCode band2, ColorCode band3, ColorCode band4) { band1.ThrowIfNullOrEmpty(nameof(band1)); band2.ThrowIfNullOrEmpty(nameof(band2)); band3.ThrowIfNullOrEmpty(nameof(band3)); band4.ThrowIfNullOrEmpty(nameof(band4)); return(CalculateOhmValue(band1.FourBand, band2.FourBand, band3.FourBand, band4.FourBand)); }