C#/LINQ - Split Number From Strings

Code to Split Number From Strings

/// <summary>

/// This Function used to spilt No from word

/// </summary>

/// <param name="strInput">Given String</param>

/// <returns>Expected No, If not found then returns -1</returns>

public Int64 SpiltNumberFromString(String strInput)

{

    string[] digits = Regex.Split(strInput, @"\D+", RegexOptions.Compiled);

    string numbers = string.Empty;

    foreach (string value in digits)

    {

        int number;

        if (int.TryParse(value, out number))

            numbers = numbers + number.ToString(CultureInfo.InvariantCulture);

    }

    return numbers.Length == 0 ? -1 : int.Parse(numbers);

}

LINQ Approach

/// <summary>

/// This Function used to spilt No from word

/// </summary>

/// <param name="strInput">Given String</param>

/// <returns>Expected No, If not found then returns -1</returns>

public Int64 SpiltNumberFromString(String strInput)

{

    int number = -1;

    string numberString = Regex.Split(strInput, @"\D+", RegexOptions.Compiled)

                            .Where(value => int.TryParse(value, out number))

                            .Aggregate(string.Empty, (current, value) => current + number.ToString(CultureInfo.InvariantCulture));

    return Int64.Parse(numberString);

}