ignore space and order on searsh c# in textbox

Question

i use this code to searsh a derictory name 

 

 

foreach (object str in Dossiers.ls_dossier_devis)
               {
                   if (str.ToString().ToLower().Contains(textBox1.Text.ToLower()))

                   {

                       listBox1.Items.Add(str);
                   }
               }

 but i want the code ignore space and order of word 

 

     

can someone help pls ?