namespace System { public struct UInt64 : IComparable, IComparable<ulong>, IConvertible, IEquatable<ulong>, IFormattable { public const ulong MaxValue = 18446744073709551615; public const ulong MinValue = 0; public int CompareTo(object value); public int CompareTo(ulong value); public bool Equals(ulong obj); public TypeCode GetTypeCode(); public static ulong Parse(string s); public static ulong Parse(string s, NumberStyles style); public static ulong Parse(string s, NumberStyles style, IFormatProvider provider); public static ulong Parse(string s, IFormatProvider provider); public string ToString(IFormatProvider provider); public string ToString(string format); public string ToString(string format, IFormatProvider provider); public static bool TryParse(string s, NumberStyles style, IFormatProvider provider, out ulong result); public static bool TryParse(string s, out ulong result); } }