thank you very much .
i imported my wallet to electrum desktop wallet and it shows me all my bitcoins, which means i can send all of them right ( the 21 included it shows me left corner buttom )
You should be able send the coins safely. Make sure to double check your sending address and also make sure your ledger wallet seeds are not compromise. I would not bother to tell all these but after reading your post I have a feeling that you are really newbie in handling the coin. Advance excuse if I am wrong 🙂
and also how can i delete electrum saftely? click on file - delete ? and i still can access to my blockchain wallet then?
Yes from the file menu just click delete. The .dat file will be deleted also from the recycling bin, make sure you delete it.
You can still access your blockchain wallet without any issue but since you can not use there site (I guess), you can do sending/receiving using this restored wallet BUT,
Since this wallet originated from blockchain and I do not trust any web wallet company which no one should as well, I advice then either create another Electrum wallet (perhaps a multiSig wallet 2/2 or 2/3 to have extra security of your coins, 21 coins are really a lot of Bitcoin) and send the coins to the new one or send them in your ledger wallet.