private async Task SaveMergedInDB(IEnumerable <Pipeline> mergeResult, Project project)
{
//Merge
var existing = project.Pipelines;
var intersect = existing.Intersect(mergeResult);
var sum = existing.Union(mergeResult);
var toDelete = sum.Except(mergeResult);
_pipelineRepository.DeleteRange(toDelete);//project.Pipelines);
//Save update to DB
project.Pipelines = mergeResult.ToList();
await _projectRepository.UpdateAsync(project, project.Id);
await _projectRepository.SaveAsync();
}