namespace System { public struct Char : IComparable, IComparable<char>, IConvertible, IEquatable<char> { public const char MaxValue = '￿'; public const char MinValue = ''; public int CompareTo(char value); public int CompareTo(object value); public static string ConvertFromUtf32(int utf32); public static int ConvertToUtf32(char highSurrogate, char lowSurrogate); public static int ConvertToUtf32(string s, int index); public bool Equals(char obj); public static double GetNumericValue(char c); public static double GetNumericValue(string s, int index); public TypeCode GetTypeCode(); public static UnicodeCategory GetUnicodeCategory(char c); public static UnicodeCategory GetUnicodeCategory(string s, int index); public static bool IsControl(char c); public static bool IsControl(string s, int index); public static bool IsDigit(char c); public static bool IsDigit(string s, int index); public static bool IsHighSurrogate(char c); public static bool IsHighSurrogate(string s, int index); public static bool IsLetter(char c); public static bool IsLetter(string s, int index); public static bool IsLetterOrDigit(char c); public static bool IsLetterOrDigit(string s, int index); public static bool IsLower(char c); public static bool IsLower(string s, int index); public static bool IsLowSurrogate(char c); public static bool IsLowSurrogate(string s, int index); public static bool IsNumber(char c); public static bool IsNumber(string s, int index); public static bool IsPunctuation(char c); public static bool IsPunctuation(string s, int index); public static bool IsSeparator(char c); public static bool IsSeparator(string s, int index); public static bool IsSurrogate(char c); public static bool IsSurrogate(string s, int index); public static bool IsSurrogatePair(char highSurrogate, char lowSurrogate); public static bool IsSurrogatePair(string s, int index); public static bool IsSymbol(char c); public static bool IsSymbol(string s, int index); public static bool IsUpper(char c); public static bool IsUpper(string s, int index); public static bool IsWhiteSpace(char c); public static bool IsWhiteSpace(string s, int index); public static char Parse(string s); public static char ToLower(char c); public static char ToLower(char c, CultureInfo culture); public static char ToLowerInvariant(char c); public static string ToString(char c); public string ToString(IFormatProvider provider); public static char ToUpper(char c); public static char ToUpper(char c, CultureInfo culture); public static char ToUpperInvariant(char c); public static bool TryParse(string s, out char result); } }