Question

hi while running my wcf service it gives me error “this operation is not supported in the wcf test client because it uses type system.object[]”

i m trying to retrieve the running process list.

[ServiceBehavior(InstanceContextMode=InstanceContextMode.Single)]
    class Windows_processes_Service:IWindows_processes_Service
    {
        ArrayList RunningProcesses_Name = new ArrayList();
        public ArrayList GetRunningProcesses()
        {
            Process[] processlist = Process.GetProcesses();
            foreach (Process nme_processes in processlist)
            {
                RunningProcesses_Name.Add(nme_processes.ProcessName.ToString());
            }
            return RunningProcesses_Name;
        }
    }

Answer 1

Since you’re adding strings (ProcessName.ToString() – though ToString() is not required as ProcessName is already a string) to your service, you should define your method to return a List<string> instead of ArrayList.

This can be simplified to:

[ServiceBehavior(InstanceContextMode=InstanceContextMode.Single)]
class Windows_processes_Service:IWindows_processes_Service
{
    public List<string> GetRunningProcesses()
    {
        return Process.GetProcesses().Select(p => p.ProcessName).ToList();
    }
}