MVC - Fix Erro - Cannot implicitly convert type 'void' to 'System.Web.Mvc.ActionResult'

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Cannot implicitly convert type 'void' to 'System.Web.Mvc.ActionResult'   
 

To fix it replace

   public ActionvoResult DoSomething()
        {
            return CallSomeFunction();
        }

        public void CallSomeFunction( )
        {
            //do nothing
        }

with 

        public void DoSomething()
        {
             CallSomeFunction();
        }

        public void CallSomeFunction( )
        {
            //do nothing
        }