MSCRM Metadata contains a reference that cannot be resolved

Error:
Metadata contains a reference that cannot be resolved: 'https://crmservice/instance/XRMServices/2011/Organization.svc?wsdl&sdkversion=7.1'.","System.Net.WebException: The request was aborted: Could not create SSL/TLS secure channel.    at System.Net.HttpWebRequest.GetResponse()    at System.ServiceModel.Description.MetadataExchangeClient.MetadataLocationRetriever.DownloadMetadata(TimeoutHelper timeoutHelper)    at System.ServiceModel.Description.MetadataExchangeClient.MetadataRetriever.Retrieve(TimeoutHelper timeoutHelper)"



Solution:

Add below line before executing the CRM Org service:

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;