Error encountered when running WCF

HTTP could not register URL http://+:3723/CalulatorService/.
Your process does not have access rights to this namespace (see for details).

The reason for this problem is a lack of permissions.
This doesn’t happen if you’re just logged in as a standalone system administrator, it does happen when you log in with a domain user,
Open program -> attachment -> Command Prompt
Enter the following statement to register.
Netsh HTTP add urlacl url=http://+:3723/CalulatorService/ user= domain name/user name

Just run it again.
If you report this error:
Create SDDL failed, Error: 1332 The parameter is incorrect.
You change the port number.

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