namespace System
{
    [ComVisible(true)]
    [DefaultMember("Chars")]
    public sealed class String : IEnumerable, IEnumerable<char>, ICloneable, IComparable, IComparable<string>, IConvertible, IEquatable<string>
    {
        [CLSCompliant(false)]
        public static string Concat(object arg0, object arg1, object arg2, object arg3);
    }
}