public void TransferAttributes( 
   MapMember source,
   long sourceOID,
   MapMember target,
   long targetOID
)

// Transfers attributes from a source feature to a target feature between specified layers.
await QueuedTask.Run(() =>
  {
    var targetOID = 12345; // object ID of the target feature in the destination layer
    var transferAttributes = new EditOperation() { Name = "Transfer Attributes" };

    // transfer attributes using the stored field mapping
    transferAttributes.TransferAttributes(featureLayer, objectId, destinationLayer, targetOID);

    //Execute to execute the operation
    //Must be called within QueuedTask.Run
    if (!transferAttributes.IsEmpty)
    {
      //Execute and ExecuteAsync will return true if the operation was successful and false if not
      var result = transferAttributes.Execute();
      //or use async flavor
      //await transferAttributes.ExecuteAsync();
    }
  });
// Transfers attributes from a source feature to a target feature between specified layers.
await QueuedTask.Run(() =>
  {
    var targetOID = 12345; // object ID of the target feature in the destination layer
    var transferAttributes = new EditOperation() { Name = "Transfer Attributes" };
    // transfer attributes using an auto-match on the attributes
    transferAttributes.TransferAttributes(featureLayer, objectId, destinationLayer, targetOID, "");

    //Execute to execute the operation
    //Must be called within QueuedTask.Run
    if (!transferAttributes.IsEmpty)
    {
      //Execute and ExecuteAsync will return true if the operation was successful and false if not
      var result = transferAttributes.Execute();
      //or use async flavor
      //await transferAttributes.ExecuteAsync();
    }
  });
// Transfers attributes from a source feature to a target feature in a specified destination layer.
await QueuedTask.Run(() =>
 {
   var targetOID = 12345; // object ID of the target feature in the destination layer
   var transferAttributes = new EditOperation() { Name = "Transfer Attributes" };
   // transfer attributes using a specified set of field mappings
   //  dictionary key is the field name in the destination layer, dictionary value is the field name in the source layer
   Dictionary<string, string> fldMapping = new()         {
    { "NAME", "SURNAME" },
    { "ADDRESS", "ADDRESS" }
   };
   transferAttributes.TransferAttributes(featureLayer, objectId, destinationLayer, targetOID, fldMapping);

   //Execute to execute the operation
   //Must be called within QueuedTask.Run
   if (!transferAttributes.IsEmpty)
   {
     //Execute and ExecuteAsync will return true if the operation was successful and false if not
     var result = transferAttributes.Execute();
     //or use async flavor
     //await transferAttributes.ExecuteAsync();
   }
 });
// Transfers attributes from a source feature to a target feature in a specified destination layer.
await QueuedTask.Run(() =>
  {
    var targetOID = 12345; // object ID of the target feature in the destination layer
    var transferAttributes = new EditOperation() { Name = "Transfer Attributes" };
    // transfer attributes using a custom field mapping expression
    string expression = "return {\r\n  " +
        "\"ADDRESS\" : $sourceFeature['ADDRESS'],\r\n  " +
        "\"IMAGE\" : $sourceFeature['IMAGE'],\r\n  + " +
        "\"PRECINCT\" : $sourceFeature['PRECINCT'],\r\n  " +
        "\"WEBSITE\" : $sourceFeature['WEBSITE'],\r\n  " +
        "\"ZIP\" : $sourceFeature['ZIP']\r\n " +
        "}";
    transferAttributes.TransferAttributes(featureLayer, objectId, destinationLayer, targetOID, expression);

    //Execute to execute the operation
    //Must be called within QueuedTask.Run
    if (!transferAttributes.IsEmpty)
    {
      //Execute and ExecuteAsync will return true if the operation was successful and false if not
      var result = transferAttributes.Execute();
      //or use async flavor
      //await transferAttributes.ExecuteAsync();
    }
  });