C#

netJP12L wrote:

ut does it mean changing a behaviour of a method in a drieved class also means polymorphism

class A
{
  public virtual void Write()
  {
     Console.Writeline ("Base Write Method");
  }
}

class B : A
{
  public override void Write()
  {
     Console.Writeline ("Class B's Write Method");
  }
}

class C : A
{
  
}

class Foo
{
  new A().Write(); // Outputs "Base Write Method"
  new B().Write(); // Outputs "Class B's Write Method"  as base method is overridden
  new C().Write(); // Outputs "Base Write Method" as the base method isn't overridden 
}

Control parent = Parent;
while(parent.Parent != null)
    parent = parent.Parent;

Application.OpenForms["formName"];

ParentForm

userControl1.TopLevelControl.Name

if (this.FindForm() != null)
            {
                Form MyForm = this.FindForm();
                
                string MyName = MyForm.Name;
                MyForm.Dispose();
            }

if (this.FindForm() != null)
            {
                string MyName = this.FindForm().Name;
                
            }

//Namespaces we need to use
using System.Diagnostics;
 
public bool IsProcessOpen(string name)
{
        //here we're going to get a list of all running processes on
        //the computer
        foreach (Process clsProcess in Process.GetProcesses()) {
                //now we're going to see if any of the running processes
                //match the currently running processes. Be sure to not
                //add the .exe to the name you provide, i.e: NOTEPAD,
                //not NOTEPAD.EXE or false is always returned even if
                //notepad is running.
                //Remember, if you have the process running more than once,
                //say IE open 4 times the loop thr way it is now will close all 4,
                //if you want it to just close the first one it finds
                //then add a return; after the Kill
                if (clsProcess.ProcessName.Contains(name))
                {
                        //if the process is found to be running then we
                        //return a true
                        return true;
                }
        }
        //otherwise we return a false
        return false;
}

List<Process> pList = new List<Process>(Process.GetProcesses());
Process pSearch = pList.Find( delegate(Process p) 
{ return p.ProcessName.ToLower() == "notepad"; 
} );