Read/Write Registry Keys

Writing and reading to/from a registry key in .Net is really easy. All that is implemented in Microsoft.Win32 namespace, so at the start put this in the usings

using Microsoft.Win32;

Than in some function write this

RegistryKey key = Registry.CurrentUser.OpenSubKey("Software", true)
.CreateSubKey("CodeItWell.com");

So, we are creating an object from the RegistryKey class, the object will open the sub key Software in HKEY_CURRENT_USER, and it will create a key there with the name CodeItWell.com.

Now lets create some values in that key

key.SetValue("URL", "http://www.codeitwell.com");
key.SetValue("Number", 1234, RegistryValueKind.DWord);

Here we create a string value URL with data http://www.codeitwell.com, and a DWORD value with its value 1234.

You can set many value kinds... see the picture below

Now open the registry editor Start -> Run -> Write "regedit" -> OK. Go to this path HKEY_CURRENT_USER\Software\CodeItWell.com, you will see the values on the right panel

To read the registry values we will use the same object, see this

MessageBox.Show(key.GetValue("URL").ToString(), "URL");

You will get a message box showing the data in URL value. Try to change that data manually in the registry editor, and then call the event where the above line of code is entered and you will see the data will be changed.

Tagged as: .net, C#

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