CORE VOILÀ

.Net Framework provides in built support for various hash functions like MD-5, SHA-1, SHA-256 etc... ComputeHash method Computes the hash value to the specified byte array. Below are the overloaded methods to Compute Hash using SHA-256 class in System.Security.Cryptography  library public byte [] ComputeHash( byte [] buffer) public byte [] ComputeHash( Stream inputStream) public byte [] ComputeHash( byte [] buffer, int offset, int count)

SHA-256 (Secure Hash Algorithm) , is one of the cryptographic hash function, commonly used in Blockchain. It generates an almost-unique 256-bit (32-byte) signature for a text.  SHA-256 is successor hash functions to SHA-1. it is one of the strongest hash functions available and has not yet been compromised in any way.   Here is source code written in  C#. I will try to give more details in next Part II