rdt-client/server/RdtClient.Service/Helpers/FileHelper.cs

using System;
using System.IO;
using System.Threading.Tasks;

namespace RdtClient.Service.Helpers
{
    public static class FileHelper
    {
        public static async Task Delete(String path)
        {
            if (String.IsNullOrWhiteSpace(path))
            {
                return;
            }

            if (!File.Exists(path))
            {
                return;
            }

            var retry = 0;

            while (true)
            {
                try
                {
                    File.Delete(path);

                    break;
                }
                catch
                {
                    if (retry >= 3)
                    {
                        throw;
                    }

                    retry++;

                    await Task.Delay(1000 * retry);
                }
            }
        }
    }
}