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.