Software license key and activation

Http://stackoverflow.com/questions/16222674/software-license-key-and-activation
Https://github.com/Labs64
Http://www.codeproject.com/Articles/11012/License-Key-Generation
https://ellipter.com/
https://technet.microsoft.com/en-us/library/dd346641(v=ws.10). aspx
Https://code.msdn.microsoft.com/windowsapps/Product-Key-Activation-to-16c92174/view/SourceCode
https://activatar.codeplex.com/
http://dotlicense.codeplex.com/
Http://www.codeproject.com/Articles/15496/Application-Trial-Maker
http://www.c-sharpcorner.com/article/a-simple-approach-to-product-activation/
Http://www.codeproject.com/Articles/35009/How-to-Generate-and-Validate-CD-Keys-for-your-Soft
https://licensekeygenerator.codeplex.com/

public static class activation{#region redegit Key public static void Makeregeditactivationcode () {Reg Istry.    Currentuser.createsubkey (@ "software\activation"); public static string Readregeditkey () {try {RegistryKey MyKey = Registry.CurrentUser.Op            Ensubkey ("Software\\activation", true); Return Mykey.getvalue ("Activationcode").        ToString ();            } catch {Setregeditkeyvalue ("");        return null; }} public static void Setregeditkeyvalue (string value) {RegistryKey MyKey = Registry.CurrentUser.OpenSub        Key ("Software\\activation", true);    Mykey.setvalue ("Activationcode", value, registryvaluekind.string); } #endregion #region Get Hardware Information public static string Getmacaddress () {string Macaddresse        s = ""; foreach (NetworkInterface nic in Networkinterface.getallnetworkinterfaces ()) {macaddresses = nic. GetphysicaLaddress ().            ToString ();        Break    } return macaddresses;        public static string Getcpuid () {string cpuid = null;            try {managementobjectsearcher mo = new ManagementObjectSearcher ("SELECT * from Win32_Processor"); foreach (var item in mo. Get ()) {cpuid = item["Processorid"].            ToString ();        } return CPUID;        } catch {return null; }} #endregion #region Hash Function public static string Mycustomhash (String input) {System.securi Ty.        Cryptography.md5cryptoserviceprovider x = new System.Security.Cryptography.MD5CryptoServiceProvider ();        byte[] bs = System.Text.Encoding.UTF32.GetBytes (input);        BS = X.computehash (BS);        System.Text.StringBuilder s = new System.Text.StringBuilder ();        int select = 1; foreach (Byte b in BS) {switch (select) {Case 1: S.append (b.tostring ("x4").                    ToLower ());                Break Case 2:s.append (b.tostring ("X3").                    ToLower ());                Break Case 3:s.append (b.tostring ("X2").                    ToLower ());                Break Case 4:s.append (b.tostring ("x1").                    ToLower ());                Break            Default:break;            } select++;        if (select > 4) select = 1;        } String Password = S.tostring ();    return password; } #endregion}

　　

Software license key and activation