Ethereum public key from a private key using the Nethereum library, which provides a set of Ethereum-related classes and functions. 

the EthECKey class from the Nethereum library is used to generate a new private key, which is assigned to the privateKey variable. The GetPubKey() method is then used to obtain the corresponding public key, which is returned as an EthECDSAPublicKey object. The ToHex() method is used to convert the public key to hexadecimal format, and the Substring(2) method is used to remove the prefix "04" from the hexadecimal string (which indicates an uncompressed public key).

The resulting output is the Ethereum public key, which is a 512-bit value in hexadecimal format (representing two 256-bit coordinates). Note that the public key is used to generate Ethereum addresses, which are used to send and receive Ethereum transactions. You can also use the Account class from the Nethereum library to create a new Ethereum account from a private key and obtain its public key, or use other Ethereum-related classes and functions from the Nethereum library to perform various Ethereum-related tasks. Note that using Ethereum-related libraries and tools requires a good understanding of Ethereum and its underlying technologies, and comes with potential risks and complexities, so caution is advised. 

generate an Ethereum private key using the Nethereum library, which provides a set of Ethereum-related classes and functions. 

the EthECKey class from the Nethereum library is used to generate a new private key, which is assigned to the privateKey variable. The GetPrivateKeyAsBytes() method is then used to obtain the private key in byte array format, which is then converted to hexadecimal format using the ToHex() method.

The resulting output is the Ethereum private key, which is a 256-bit value in hexadecimal format. Note that generating a private key is a critical operation that requires a strong source of randomness, and that you should never share or reveal your private key to others.

You can also use the Account class from the Nethereum library to create a new Ethereum account from a private key, or use other Ethereum-related classes and functions from the Nethereum library to perform various Ethereum-related tasks. Note that using Ethereum-related libraries and tools requires a good understanding of Ethereum and its underlying technologies, and comes with potential risks and complexities, so caution is advised.