Set Registry value throws UnauthorizedAccessException [duplicate]

Question

I have a C# application and I am trying to edit a service through the registry. I am using a manifest file that requires administrator privileges to run my application. Despite that, this code throws

System.UnauthorizedAccessException: Cannot write to the registry key.

RegistryKey key = Registry.LocalMachine.OpenSubKey ("SYSTEM\\CurrentControlSet\\services\\Tomcat7");
key.SetValue ("Start", 2, RegistryValueKind.DWord);

Does anybody have any ideas for how to fix this?

Answer 1

Follow the following code, note the additional true argument:

RegistryKey key = Registry.LocalMachine.OpenSubKey("SYSTEM\\CurrentControlSet\\services\\Tomcat7",true);
key.SetValue("Start", 2, RegistryValueKind.DWord);

Answer 2

This might help ,

Link to similar issue on stack overflow

looks like you are opening the key read only.