System.Char char System.IComparable System.IFormattable System.IConvertible MinValue System.Char Character.MIN_VALUE MaxValue System.Char Character.MAX_VALUE System.String ToString String.valueOf(${this}) System.Boolean IsDigit System.Char ch Character.isDigit(${ch}) System.Boolean IsLetter System.Char ch Character.isLetter(${ch}) System.Boolean IsUpper System.Char ch Character.isUpperCase(${ch}) System.Boolean IsLower System.Char ch Character.isLowerCase(${ch}) System.Boolean IsWhiteSpace System.Char ch Character.isWhitespace(${ch}) System.Char ToUpper System.Char ch Character.toUpperCase(${ch}) System.Char ToLower System.Char ch Character.toLowerCase(${ch})