namespace System
{
[vmf=iscspace]
public extern bool IsCSpace(char c);
[vmf=iscalpha]
public extern bool IsCAlpha(char c);
[vmf=iscalnum]
public extern bool IsCAlnum(char c);
[vmf=iscdigit]
public extern bool IsCDigit(char c);
[vmf=iscxdigit]
public extern bool IsCHexDigit(char c);
[vmf=iscpunct]
public extern bool IsCPunctuation(char c);
[vmf=iscprint]
public extern bool IsCPrintable(char c);
[vmf=isclower]
public extern bool IsCLower(char c);
[vmf=iscupper]
public extern bool IsCUpper(char c);
[vmf=toclower]
public extern char ToCLower(char c);
[vmf=tocupper]
public extern char ToCUpper(char c);
}