public static string ReplaceCharInString(
	this string str,
	int index,
	char newChar
)

<ExtensionAttribute> _
Public Shared Function ReplaceCharInString ( _
	str As String, _
	index As Integer, _
	newChar As Char _
) As String

[ExtensionAttribute]
public:
static String^ ReplaceCharInString(
	String^ str, 
	int^ index, 
	wchar_t^ newChar
)