I had been using BTC for a while now and I used to use Bitcoin Core in my system for all transactions, recently I had a problem with my computer and now I just thought let me use blockchain.info website.
But the private key which I had for my address in bitcoin core shows a different address in blockchain and I'm not able to see my balance.
Could anyone help or suggest me on this?
It seems that you have the wrong private key and what's not wise is to expose private keys to online wallets.You should use Electrum which is desktop and lightweight wallet and you can import your private keys there.But I would recommend you to create Electrum standard wallet with seed and just send your
BTC from Core to Electrum.
In case you still want to try import private keys you need to have private keys for all addresses that have some balance in Core.If you decide to use Electrum and send
BTC from Core be careful to download only from
https://electrum.org/#home