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//Namespace Reference
using System.Text.RegularExpressions;

/// <summary>
/// Method for removing trailing and leadingt whitespace from a string
/// </summary>
/// <param name="str">The string to trim</param>
/// <returns></returns>
public string TrimString(string str)
{
    try
    {
        string pattern = @"^[ \t]+|[ \t]+$";
        Regex reg = new Regex(pattern, RegexOptions.IgnoreCase);
        str = reg.Replace(str, "");
        return str;
    }
    catch (Exception ex)
    {
        throw ex;
    }
}