TOPIC:

DoZipping(cZipName,FileMode.Open,liFilesToBackup,dLastChanged,lDifferential,lIncremental);

try
			{
				using (Ionic.Zip.ZipFile zip = new Ionic.Zip.ZipFile())
				{
					string cPW = this.PW.Password.ToString();
					if (!string.IsNullOrEmpty(cPW))
					{
						if (this.pkzip.IsChecked == true)
						{
							zip.Encryption = Ionic.Zip.EncryptionAlgorithm.PkzipWeak;
						}
						if (this.aes128.IsChecked == true)
						{
							zip.Encryption = Ionic.Zip.EncryptionAlgorithm.WinZipAes128;
						}
						if (this.aes256.IsChecked == true)
						{
							zip.Encryption = Ionic.Zip.EncryptionAlgorithm.WinZipAes256;
						}
						zip.Password = cPW;
					}
					zip.ZipErrorAction=ZipErrorAction.Skip;												
					zip.UseZip64WhenSaving = Zip64Option.AsNecessary;										
					string cFilesToBackup = liFilesToBackup.Count.ToString();
					tStart = DateTime.Now;														
					foreach (FileInfo file in liFilesToBackup)											
					{
						cFileFull = file.FullName;												
						bool lResult = CreateZipEntry(zip, file, cFileFull);														
					}   // ForEach

					try																					
					{
						zip.SaveProgress += ZipSaveProgress;																
						zip.Save(cZipName);
					} // try
					catch (Exception e)
					{
					}
				} // using
			} // try
			catch (System.Exception e)
			{
			}

private bool CreateZipEntry(Ionic.Zip.ZipFile zip, FileInfo file, string cFileFull)
			{
			{
				string cFileToBackup;
				string cPath;
				string cFileOnly;
				string cRoot;
				string cPathOnly;
				int nLen;
				try
				{
					DateTime dtNow = File.GetLastWriteTime(cFileFull);															
					cPath = System.IO.Path.GetDirectoryName(cFileFull);
					cFileOnly = System.IO.Path.GetFileName(cFileFull);															
					cFileToBackup = cPath + "\\" + cFileOnly;
					cRoot = System.IO.Path.GetPathRoot(cFileFull);																
					nLen = cRoot.Length;																			
					cPathOnly = cPath.Remove(0, nLen - 1);																	

					cFileToBackup = cPathOnly + "\\" + cFileOnly;																
					if (cFileToBackup.Substring(0, 1) == "\\")																
						cFileToBackup = cFileToBackup.Substring(1);															

					System.Text.StringBuilder builder = new System.Text.StringBuilder(cFileToBackup);											
					builder.Replace("\\", "/");																		
					string cPathToAdd = builder.ToString();

					try
					{
						{
							var zipEntry=zip.AddFile(cFileFull, cPath);														
							zipEntry.Comment=cPath.Substring(0,1);															
						}
						if (lResetArchivebit)																		
						{
							bool lArchive = ((File.GetAttributes(cFileFull) & FileAttributes.Archive) == FileAttributes.Archive);							
							File.SetAttributes(cFileFull, File.GetAttributes(cFileFull) & ~FileAttributes.Archive);									
						}
					}
					catch (Exception e)
					{
					}
					return true;
				}		// try mainloop
				catch (Exception e)
				{
				}

			};
			// return taskZip1File.Result;
		}