public sealed class RowBuffer : ArcGIS.Core.CoreObjectsBase, System.IDisposable  

{
  await QueuedTask.Run(() =>
  {
    string message = String.Empty;
    bool creationResult = false;
    EditOperation editOperation = new EditOperation();

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

{
  await QueuedTask.Run(() =>
  {
    string message = String.Empty;
    bool creationResult = false;
    using (Geodatabase geodatabase = new Geodatabase(new DatabaseConnectionFile(new Uri("path\\to\\sde\\file\\sdefile.sde"))))
    using (FeatureClass enterpriseFeatureClass = geodatabase.OpenDataset<FeatureClass>("LocalGovernment.GDB.FacilitySite"))
    {
      //Declare the callback here. We are not executing it yet
      EditOperation editOperation = new EditOperation();
      editOperation.Callback(context =>
      {
        FeatureClassDefinition facilitySiteDefinition = enterpriseFeatureClass.GetDefinition();
        int facilityIdIndex = facilitySiteDefinition.FindField("FACILITYID");

        using (RowBuffer rowBuffer = enterpriseFeatureClass.CreateRowBuffer())
        {
          // Either the field index or the field name can be used in the indexer.
          rowBuffer[facilityIdIndex] = "wMain";
          rowBuffer["NAME"] = "Griffith Park";
          rowBuffer["OWNTYPE"] = "Municipal";
          rowBuffer["FCODE"] = "Park";
          // Add it to   Attractions Subtype.
          rowBuffer[facilitySiteDefinition.GetSubtypeField()] = 820;

          List<Coordinate2D> newCoordinates = new List<Coordinate2D>
          {
              new Coordinate2D(1021570, 1880583),
              new Coordinate2D(1028730, 1880994),
              new Coordinate2D(1029718, 1875644),
              new Coordinate2D(1021405, 1875397)
          };

          rowBuffer[facilitySiteDefinition.GetShapeField()] = new PolygonBuilderEx(newCoordinates).ToGeometry();

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

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

    if (!string.IsNullOrEmpty(message))
      Debug.WriteLine(message);
  });
}