Remove special characters from String

public static string RemoveSpecialCharacters(string str)
    {
        System.Text.StringBuilder sb = new System.Text.StringBuilder();
        for (int i = 0; i < str.Length; i++)
            if ((str[i] >= '0' && str[i] <= '9') || (str[i] >= 'A' && str[i] <= 'z' || (str[i] == '.' || str[i] == '_')))
                sb.Append(str[i]);
        return sb.ToString();
    }

Reference: Muthukumar (http://nadarmuthukumar.blogspot.in)

Posted in: Asp.Net,C#