Reports the zero-based index position of the last occurrence of a specified string within this instance. Parameters specify the starting search position in the current string, the number of characters in the current string to search, and the type of search to use for the specified string. (Invariant culture, Ignore case).

public static int LastIndexOf(
	this StringBuilder sb,
	string s
)

<ExtensionAttribute> 
Public Shared Function LastIndexOf ( 
	sb As StringBuilder,
	s As String
) As Integer

public:
[ExtensionAttribute]
static int LastIndexOf(
	StringBuilder^ sb, 
	String^ s
)

static member LastIndexOf : 
        sb : StringBuilder * 
        s : string -> int