## CustomXmlSchemaColle::idx_set method Gets or sets the element at the specified index. ```cpp void Aspose::Words::Markup::CustomXmlSchemaColle::idx_set(int32_t index, const System::String &value)......Shows how to work with an XML schema collection. ```cpp auto doc...Add an XML schema association. xmlPart->get_Schemas()->Add(u"http://www...