Run Your Software only in known or specified Computer

Run Your Software only in known or specified Computer:

Run Your Software only in known or specified Computer So that Your Software will not be distributed by your customer to number of people is a every day work. You have understood how to run a small application in any Computer to store your Secret key their in Store Secret Key on Registry Editor using C# ,

Read Code From Registry Editor Using C#

 Now You only have to add a small Code in your Software to do so. The Code is given below... Again You have to run Visual Studio as Administrator.

public bool  read_key()
        {
            int code;
            RegistryKey software = Registry.LocalMachine.OpenSubKey("SOFTWARE", true);
            RegistryKey regEx = software.OpenSubKey("RegDotNet", true);// Accessing  a subdirectory RegDotNet in Directory "Software

            if (regEx != null) // Codition to check nullity
            {
                RegistryKey sec = regEx.OpenSubKey("secret key", true);// Opening sizekey Subdirectory of RegDotNet

                if (sec != null)// Condition to check nullti of size subdirectory
                {
                    code = Convert.ToInt32(sec.GetValue("code").ToString());// getting value  on width stored in "secret key" subdirectory

                    if (code == 123)// 123 is the Stored code
                    {
                        return true;
                    }
                    else
                    {
                        return false;
                    }                  

                }
                else
                {
                    return false;
                }
            }
            else
            {
                return false;
            }

        }

Now Call this Function in Constructor of the Application like this

public Form1()
        {
            InitializeComponent();
            c = new calculations();// it is the object of another class in which calculations are done... no use in this Program
            if (read_key() != true)
            {
                this.Close();
            }}
           

OUTPUT:

The Application will be closed if code is not matched by the code that is saved by us in Store Secret Key on Registry Editor using C#  ...

And if the code is matched .. the Application will run Normally.

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