StringExBetween 方法

public static string Between(
	this string value,
	string x,
	string y
)

<ExtensionAttribute>
Public Shared Function Between ( 
	value As String,
	x As String,
	y As String
) As String

[<ExtensionAttribute>]
static member Between : 
        value : string * 
        x : string * 
        y : string -> string