Can I evaluate two groups of items with a foreach loop in C# winforms? -

i have winforms tabcontrol , trying cycle through controls contained in each tab. there way add and in foreach loop or isn't possible evaluate more 1 group of items? example i'd do:

foreach (control c in tb_invoices.controls , tb_statements.controls) {     //do } 

or

foreach (control c in tb_invoices.controls, tb_statements.controls) {     //do } 

is possible, , if not, next best thing? need use for loop?

foreach(tabpage page in yourtabcontrol.tabpages){    foreach(control c in page.controls){       loopthroughcontrols(c);    }   }  private void loopthroughcontrols(control parent){    foreach(control c in parent.controls)       loopthroughcontrols(c); }