Share your whole workspace means all your contacts with others by following these steps.
Step 1: On your PC Go to ContactBook, And Log In with your account.
Step 2: Click on the Gear icon which is located on the left side bar.
Step 3: Now click on members, Add the email of the person to whom you want to share space, Manage Permission, And Click on Add.
Step 4: Wow! Your space has been shared.