I am looking for a good api with c# support for bitcoin as payment method in my web site.

My purposes from this api is :

1. Create unique btc address for each order
2. Deposit job with CallBack url
3. Withdraw job
4. Minimum limits of requests

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Firstly i tried to use BitcoinLib library.
But i have two problems about it :
1. I do n'r want to download big size of bitcoin core in my local machine & in my server.
2. I could n't find good examples for my purposes related to BitcoinLib library.

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Secondly i find this third party api : 
BitGo
It was perfect and can handle all my jobs.
But i have one problem about it :
1. I can not run "sendcoins" event and make transactions in c# because build-sign-send jobs in this api need express environment of BitGo and my c# library can not handle it.

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Please introduce me a good api for those purposes!
Alao tell me can BitcoinLib handle those jobs.
If yes, How???

https://bitcointalk.org is the best & people around here are really pro.
Thanks for the answers.

I have a web site and i want create a unique "Legacy" & "Nested SegWit" & "Native SegWit" address for every customer to send & receive bitcoin.
So i need a free api to handle this!
Unlimited addresses!
No Expiration of those addresses!
I do n't want use some third party sites like https://www.coinpayments.net for payment method because i need unique address for every customer for another purpose than payment.

Please check out this link :
https://www.blockchain.com/api/api_receive
As you see we can generate receiving addresses for our customers using this api.

My first question is : what is the type of that generated address?
"Legacy" or "Nested SegWit" or "Native SegWit"?

My other question is : is there a way to generate "Legacy" & "Nested SegWit" & "Native SegWit" addresses for receive separately?

This link solved my issue.

regex-bitcoin-addresses

My goal is recognize that a string is bitcoin address or not.(Offline Mode)
So for this purpose introduce a good library.

Would you please show some examples of usage these methods :
AddressType GetAddressType(string address, NetworkType netType)
AddressType GetAddressType(string address, NetworkType netType, out byte[] data)
bool VerifyType(string address, PubkeyScriptType scrType, out byte[] hash)

What is NetworkType netType? Is this method working offline?
I need a method that returns TRUE or FALSE.

Thanks for the answer,
But in this link bitcoin-address-validator
They are validating legacy, segwit and native segwit (bech32) Bitcoin addresses.
It's in php language.
So there should be a way for Nested SegWit (P2SH) too.

I am looking for a class or method in c# language to validate bitcoin address.(OFFLINE)
I want to validate [Legacy, Nested SegWit, Native SegWit] address types.
For this purpose i found this :   
determine-if-a-bitcoin-wallet-address-is-valid
But it validates Legacy addresses only.

I also found this : 
bitcoin-address-validation
But i think it is using an api for this purpose & language is not c#.

I also found this : 
bitcoin-address-validator
This is not in c# language. It's php & i am not familiar with php.

I also found this :
address_validation
Too old and only for Legacy addresses.

Please give me a solution on this.

bitmover. Thanks a million. You saved totally on this.

I need a simple url to grab json or html from it.
Form the other thread no body introduce such this url.
Confirmed | Not Confirmed transactions is not important.
I am c# developer.
When i send a request with HttpWebRequest to https://www.blockchain.com/explorer several times this site blocks my ip.
Also when i send a request with HttpWebRequest to https://mempool.space it returns nothing as response.

Would you please show me urls for that?
I want to repeat this job every 10 minutes and grab new 100 TXs.
Here is the process :
1- Firs of all i need 100 latest TXs > Confirmed | Not Confirmed with details - Details mean i need btc amount + output bitcoin address related to that tx.
So imagine how many requests should i send to that api or url for garb details.
2- Repeat level 1 after 10 minutes again for new 100 TXs.

So which api or url can i use without ban issue?

Please take a look at these two links :   

Blockchain Explorer | Latest Transactions

mempool.space | Latest transactions

I am looking for a free api to grab 100 latest bitcoin trasactions in the blockchain network | Confimmed or Not Confirmmed!   
Which api should i use for this purpose?   

Sorry - that was a mistake in typing - i changed my post.
Tether(USDT) was my meaning.

Hi dear pro people here,
What is the best theter wallet?
I need web based wallet only because i am using pc all the time.
Also i need a wallet with low transaction fee.

Thanks for the help & your attention

Really appreciate for the answer.

I want to create a wallet for Tether(USDT) & buy some tether.
For wallet i chose myetherwallet.com
Some month ago i transferred some ncash to myetherwallet.com.
Now i can not transfer that ncash because my ethereum balance is zero and i do n't have enough gas as transaction fee.(6000 ncash needs around 2$ ethereum for transaction fee)
Now i want to know what will happen to my new tether?
does it need ethereum like ncash for transaction fee?
Is myetherwallet.com a good wallet for tether?

Thanks for the reply.
It seems satoshi / vbyte is different from satoshi / byte.
This Link returns satoshi / vbyte.
Where can i know 100$ = 0.0019 btc how much is that in byte or vbyte?

I am c# developer.
I need a free api to calculate transaction FEE (BITCOIN) for instant confirmation.
Mean i want to pass amount to api and it show me transaction FEE for instant confirmation.
Because in these days i saw many troubles for high fees during transactions.
So i need to know about fees in my codes.

Thanks for the review and for the help

PROBLEM SOLVED AFTER ONE WEEK USING ELECTRUM WALLET.
THOSE TWO UNCONFIRMED TRANSACTIONS REMOVED FROM MEMPOOL AND NEW ONE WITH HIGHER FEE CONFIRMED AFTER 30 MINUTES.
PEOPLE WHO READ THIS :
NEVER USE 10 SATOSHI / BYTE AS YOUR FEE AND DO N'T LISTEN THAT SUGGESTION IN THIS THREAD.
LOW FEE = BIG TROUBLE = NEVER CONFIRM = YOU SHOULD WAIT WEEKS TO SEE WHAT HAPPENS