Requested registry access is not allowed

Question

dear everyone i made a windows application using c#, in my application i have to write values in registry.. the problem exists in limited users (not administrator) accounts this error exception appear " Requested registry access is not allowed"
tried to solve this issue by 2 methods
method 1:
i put in my manifest file the below code
<?xml version="1.0" encoding="utf-8"?> <asmv1:assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1" xmlns:asmv1="urn:schemas-microsoft-com:asm.v1" xmlns:asmv2="urn:schemas-microsoft-com:asm.v2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <assemblyIdentity version="1.0.0.0" name="MyApplication.app"/> <trustInfo xmlns="urn:schemas-microsoft-com:asm.v2"> <security> <requestedPrivileges xmlns="urn:schemas-microsoft-com:asm.v3"> <!-- UAC Manifest Options If you want to change the Windows User Account Control level replace the requestedExecutionLevel node with one of the following. <requestedExecutionLevel level="asInvoker" uiAccess="false" /> <requestedExecutionLevel level="requireAdministrator" uiAccess="false" /> <requestedExecutionLevel level="highestAvailable" uiAccess="false" /> If you want to utilize File and Registry Virtualization for backward compatibility then delete the requestedExecutionLevel node. --> <requestedExecutionLevel level="requireAdministrator" uiAccess="false" /> </requestedPrivileges> </security> </trustInfo> </asmv1:assembly> Method 2:
i tried to make the registry has full control for users so i can write into registry regardless of user type using this code
string user = Environment.UserDomainName + "\\" + Environment.UserName; RegistrySecurity rs = new RegistrySecurity(); // Allow the current user to read and delete the key. // rs.AddAccessRule(new RegistryAccessRule(user, RegistryRights.ReadKey | RegistryRights.WriteKey | RegistryRights.Delete, InheritanceFlags.None, PropagationFlags.None, AccessControlType.Allow));
it solve the error in many computers but there are many other computer has the same error.
i want to solve this error but i can not make it in all versions of windows.
please advice as soon as possible