Merging records through C# code

Question

Below is the offending code.
Merge.MergeRecordsWS_MergeRecords_Input mergei = new Merge.MergeRecordsWS_MergeRecords_Input();
Merge.MergeRecordsWS_MergeRecords_Output mergeo;
mergei.PrimaryId = LeadID;
mergei.DuplicateId = ELead.LeadId;
mergei.RecordType = "Lead";
mergei.MergeWhenPrimaryBlank = "True";
mergeo = Merger.CallMergeRecords(mergei);
Merger is declared and initialized as a MergeRecords object with the correct URL and session ID.
When this code is executed, sometimes, it returns an error of There already exists a record with those values.
This doesn't happen all the time, but I am not able to pin down a scenario where it fails consistently. This is part of a larger bit of automated code that runs when a new Lead is created. It is designed to detect duplicates and remove them by merging the records. Why would I get a "record exists with those values" error? Of course one exists, thats why we're trying to merge them. I have checked the ones that have failed recently, and there are only 2 leads that exist with the same information, and both of them are being referenced by the ID's above.

Answer 1

Use the below link:
https://msdn.microsoft.com/en-us/library/cc264319(v=office.12).aspx
To back up a site collection, call the Backup method. As parameters pass
the following:
The full URL of the site collection; that is, the full URL of its Top Level Web site.
The full path and file name of the file that will hold the compressed content of the site collection.
True, if the operation should overwrite an existing backup file of the same name; false, if it should not.
C#
mySiteCols.Backup(@"http://Server/sites/MySiteCollection", @"\\OtherServer\WSSBackups\SiteCollections\BackupOfMySiteCollection", true);
To restore a site collection, call the Restore method. It takes the same
parameters as the Backup method. The Boolean parameter
indicates whether the site collection should be overwritten if it already exists at the specified URL.
C#
mySiteCols.Restore(@"http://Server/sites/MySiteCollection", @"\\OtherServer\WSSBackups\SiteCollections\BackupOfMySiteCollection", true);
Example