Executing a method only once in windows form app in c#

Question

In my app (in c#) i want to execute a method only once in whole application such that if i start the application again then that method shouldn't execute or call again. Can anyone help me in this problem?

Kailash Chandra Behera · Answer

Hi Paras In Programm class (Start up Class) and within the static method try to check the data is exist in registry or not. if not exist then call your method and if not exist then call the your method. Code string filename; string KeyName=your registry key name where your text exist; // Opening the registry key RegistryKey rk = baseRegistryKey ; // Open a subKey as read-only RegistryKey sk1 = rk.OpenSubKey(subKey); // If the RegistrySubKey doesn't exist -> (null) if ( sk1 == null ) { //Call Method } else { try { // If the RegistryKey exists I get its value // or null is returned. filename= ( string )sk1.GetValue(KeyName.ToUpper()); } catch (Exception e) { // AAAAAAAAAAARGH an error! MessageBox.Show (e  Reading registry  + KeyName.ToUpper()); } } if(File.Exists(full path)==true) { MessageBox.Show(File Exists); } else { MessageBox.Show(File not Exists); } Kindly mark as answer  if it helps to you Thanks Kailash

Paras Kharbanda · Answer

Sir i want to write data in registry only once.So i made a method of writing data in itnow i want to call this method only once in my application.

Kailash Chandra Behera · Answer

Hi Paras Can you explain your requirement with conditions you want implement. Thanks Kailash