<?xml version="1.0" encoding="utf-8"?><HelpTOCNode Title="IndexOf Method " Url="html/Overload_Independentsoft_Sip_Sdp_AttributeCollection_IndexOf.htm"><HelpTOCNode Title="IndexOf Method (String)" Url="html/M_Independentsoft_Sip_Sdp_AttributeCollection_IndexOf_1.htm" /><HelpTOCNode Title="IndexOf Method (Attribute)" Url="html/M_Independentsoft_Sip_Sdp_AttributeCollection_IndexOf.htm" /></HelpTOCNode>