How to integration Blockchain Payment API in Asp.Net? I am new to using the Blockchain API. I have tried several times to use
https://blockchain.info/merchant/$guid/payment?password=$password&amp;second_password=$second_password&amp;to=$to&amp;amount=$amount
but it always redirects me to https://blockchain.info/api/blockchain_wallet_api instead.

I don't understand why it doesn't give any response.
I'm assuming you're new to API.

The link you gave,
    https://blockchain.info/merchant/$guid/payment?password=$password&amp;second_password=$second_password&amp;to=$to&amp;amount=$amount

Is only a template for an API request. You need to swap out the $guid with your merchant wallet id, e.g.

4b8cd8e9-9480-44cc-b7f2-527e98ee3287


You also need to substitute every other variable starting with a $ with the respective information.

e.g. password=&lt;insert password here&gt;