Registry.CurrentUser.CreateSubKey (creates a Key if does not exists but i want only to read)

Question

hello every one  i have one big problem . if i remove my registry key from regedit then next time software automatically create registry key . but i want that if registry does not exists then software should not be open . if it possible then let me know and my code is there RegistryKey regKeyAppRoot = Registry.CurrentUser.CreateSubKey(Software); String GUID=(String)regKeyAppRoot.GetValue(KEY); if (GUID == CF91F736-2830-4233-9EC9-9C2AE482B650) { //code } else { MessageBox.Show(); this.Close(); } Its urgent Reply me As soon as Possible Thanks in Advance

Nilanka Dharmadasa · Answer

Hey Naim You are back.. Why don't u use opensubkey method to read the key as i mentioned in your previous thread? RegistryKey regKeyAppRoot = Registry.CurrentUser.OpenSubKey(........); if( (regKeyAppRoot != null) && (regKeyAppRoot.GetValue(KEY) != null){ String GUID=(String)regKeyAppRoot.GetValue(KEY); if (GUID == CF91F736-2830-4233-9EC9-9C2AE482B650) { //code } else { MessageBox.Show(); this.Close(); } } else{ MessageBox.Show(); this.Close(); } For more info go to this link.It provides a detailed explaination. http://www.codeproject.com/KB/system/registry1.aspx?msg=812147

Kirtan Patel · Answer

Hi Friend Here is Solution to your Problem Here is Rectified Code of yours if my answer helps you then check Do you like this answer :) RegistryKey regKeyAppRoot = Registry .CurrentUser.OpenSubKey( Software  true ); string GUID = regKeyAppRoot.GetValue( KEY   ).ToString(); if (GUID == CF91F736-2830-4233-9EC9-9C2AE482B650 ) { MessageBox .Show( Key Matched !! ); } else if (GUID ==  ) { MessageBox .Show( KeyNot Found!! ); //Do Whatever you want here if Key Not Found this .Close(); }

Serban Cosmin · Answer

I think you should first try to open that key using the RegistryKey.OpenSubKey method which is documented here : http://msdn.microsoft.com/en-us/library/xthy8s8d.aspx. If this method returns a null value it means that the key does not exist and you should create it by calling CreateSubKey. Hope this helps. Don't forget to mark this answer accepted if it helped you.