using System.Globalization;
public static void Main()
Console.WriteLine(IncrementDigits(123));
public static int IncrementDigits(int originalNumber)
string originalString = Math.Abs(originalNumber).ToString(CultureInfo.InvariantCulture);
string finalString = string.Empty;
var incrementedValues = originalString.Select(z => int.Parse(z.ToString(CultureInfo.InvariantCulture)) + 1);
foreach (var item in incrementedValues)
finalString = finalString + item;
if (int.TryParse(finalString, NumberStyles.Integer, CultureInfo.CurrentCulture, out int finalNumber))