error on wcf rest full service please help me

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WCF

when i run the project this error shows please help me

Error: Cannot obtain Metadata from http://localhost:50423/Service1.svc If this is a Windows (R) Communication Foundation service to which you have access, please check that you have enabled metadata publishing at the specified address. For help enabling metadata publishing, please refer to the MSDN documentation at http://go.microsoft.com/fwlink/?LinkId=65455.WS-Metadata Exchange Error URI: http://localhost:50423/Service1.svc Metadata contains a reference that cannot be resolved: 'http://localhost:50423/Service1.svc'. There was no endpoint listening at http://localhost:50423/Service1.svc that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details. Unable to connect to the remote server No connection could be made because the target machine actively refused it 127.0.0.1:50423HTTP GET Error URI: http://localhost:50423/Service1.svc There was an error downloading 'http://localhost:50423/Service1.svc'. Unable to connect to the remote server No connection could be made because the target machine actively refused it 127.0.0.1:50423