public void Callback( 
   Action<EditOperation.IEditContext> action,
   Dataset dataset
)

QueuedTask.Run(() =>
{
  var editOp = new EditOperation();
  editOp.Name = "Blob Cursor";
  var featLayer = MapView.Active.Map.FindLayers("Hydrant").First() as FeatureLayer;

  editOp.Callback((context) =>
  {
    using (var rc = featLayer.GetTable().Search(null, false))
    {
      while (rc.MoveNext())
      {
        using (var record = rc.Current)
        {
          //read the blob field and save to a file
          var msw = new MemoryStream();
          msw = record["BlobField"] as MemoryStream;
          using (FileStream file = new FileStream(@"d:\temp\blob.jpg", FileMode.Create, FileAccess.Write))
          {
            msw.WriteTo(file);
          }

          //read file into memory stream
          var msr = new MemoryStream();
          using (FileStream file = new FileStream(@"d:\images\Hydrant.jpg", FileMode.Open, FileAccess.Read))
          {
            file.CopyTo(msr);
          }

          //put the memory stream in the blob field and save to feature
          record["BlobField"] = msr;
          record.Store();

        }
      }
    }
  }, featLayer.GetTable());
  if (!editOp.IsEmpty)
  {
    var result = editOp.Execute(); //Execute and ExecuteAsync will return true if the operation was successful and false if not
  }
});

public async Task CreatingARow()
{
  string message = String.Empty;
  bool creationResult = false;
  EditOperation editOperation = new EditOperation();

  await ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>
  {

    using (Geodatabase geodatabase = new Geodatabase(
      new DatabaseConnectionFile(new Uri("path\\to\\sde\\file\\sdefile.sde"))))
    using (Table enterpriseTable = geodatabase.OpenDataset<Table>("LocalGovernment.GDB.piCIPCost"))
    {

      //var geodatabase = new Geodatabase(new FileGeodatabaseConnectionPath(uri)) for a File GDB
      //
      //var shapeFileConnPath = new FileSystemConnectionPath(uri, FileSystemDatastoreType.Shapefile);
      //var shapefile = new FileSystemDatastore(shapeFileConnPath);
      //var table = shapefile.OpenDataset<Table>(strShapeFileName); for a Shape file

      //declare the callback here. We are not executing it .yet.
      editOperation.Callback(context =>
      {
        TableDefinition tableDefinition = enterpriseTable.GetDefinition();
        int assetNameIndex = tableDefinition.FindField("ASSETNA");

        using (RowBuffer rowBuffer = enterpriseTable.CreateRowBuffer())
        {
          // Either the field index or the field name can be used in the indexer.
          rowBuffer[assetNameIndex] = "wMain";
          rowBuffer["COST"] = 700;
          rowBuffer["ACTION"] = "Open Cut";

          // subtype value for "Abandon".
          rowBuffer[tableDefinition.GetSubtypeField()] = 3;

          using (Row row = enterpriseTable.CreateRow(rowBuffer))
          {
            // To Indicate that the attribute table has to be updated.
            context.Invalidate(row);
          }
        }
      }, enterpriseTable);

      try
      {
        creationResult = editOperation.Execute();
        if (!creationResult) message = editOperation.ErrorMessage;
      }
      catch (GeodatabaseException exObj)
      {
        message = exObj.Message;
      }
    }
  });

  if (!string.IsNullOrEmpty(message))
    MessageBox.Show(message);

}