versatast.cs

/// <summary>
/// Inspired by D.S. :) 
/// </summary>
/// <param name="stringInput"></param>
/// <param name="numberOfChars"></param>
/// <returns></returns>
public static string Versatilizaastoosanon_v2(this string stringInput, int numberOfChars)
{
    // Check if numberofchars is 0 or below 0. If yes, return empty string.
    if (numberOfChars <= 0)
        return string.Empty;

    // Check if numberofchars is higher than the number of digits in string. If yes, change it to length of string.
    if (numberOfChars > stringInput.Length)
        numberOfChars = stringInput.Length;

    // Check if numberofchars is equal the number of digits in string. If yes, return string in uppercase.
    if (numberOfChars == stringInput.Length)
        return stringInput.ToUpper();

    var chars = stringInput.ToArray();

    string result = string.Empty;
    for (int i = 0; i < numberOfChars; i++)
    {
        result += chars[i];
    }

    return result.ToUpper();
}