C# file not saving on correct folder -

i need save txt file on correct create folder. saving on c:\nova pasta need save on "c:\nova pasta\"+valor.retorna_nome+combobox1.text whats wrong ?

private void btn_savefile_click(object sender, eventargs e) {     objsql.search_rgp_cadastroprint(convert.toint32(combobox1.text), str_list);     objsql.searchprint(convert.toint32(combobox1.text));      string path = @"c:\nova pasta\"+valor.retorna_nome+combobox1.text;      if (!directory.exists(path))     {         directory.createdirectory(path);      }     streamwriter file = new system.io.streamwriter(path + ".txt");      file.writeline("---------------------------------------------------------------------------------------------------------");     file.writeline("nome: " + valor.retorna_nome);     file.writeline("rgp: " + combobox1.text);     file.writeline("endereço: " + valor.retorna_endereco);     file.writeline("telefone: " + valor.retorna_telefone + " celular: " + valor.retorna_celular + "\r\n");     str_list.foreach(file.writeline);      file.close(); } 

say valor.retorna_nome "hello", , combobox1.text "world". code following:

string path = @"c:\nova pasta\"+valor.retorna_nome+combobox1.text; // -> path = "c:\nova pasta\helloworld"  if (!directory.exists(path)) {     directory.createdirectory(path);     // -> created directory "c:\nova pasta\helloworld" }  streamwriter file = new system.io.streamwriter(path + ".txt"); // -> writes file "c:\nova pasta\helloworld.txt" 

so it's doing told to. directory called? , filename?