To assign a strong-name key to the Class library
In this section, you assign a strong-name key to the class library.
In Solution Explorer, right-click the bold project name that is in bold type, and then select Properties.
Click the Signing tab.
Select the Sign the assembly checkbox.
From the Choose a strong name key file: combo box, select <New...>
In the Create Strong Name Key dialog box, in the Key file name: text field, enter a string value.
> [!NOTE]
> <P>For example, a possible string value could be your last name and today's date.</P>
Clear Protect my key file with a password, and then click OK.
Close the Signing window.
From the Build menu, click Build Solution.
Close Visual Studio.
Next, you add the assembly to the Global Assembly Cache (the GAC).