Block class, which will represent each block in the blockchain

Block.cs

public class Block
{
    public int Index { get; set; }
    public DateTime Timestamp { get; set; }
    public string Data { get; set; }
    public string PreviousHash { get; set; }
    public string Hash { get; set; }
    public Block(int index, DateTime timestamp, string data, string previousHash)
    {
        Index = index;
        Timestamp = timestamp;
        Data = data;
        PreviousHash = previousHash;
        Hash = CalculateHash();
    }
    private string CalculateHash()
    {
        using (var sha256 = SHA256.Create())
        {
            var inputBytes = Encoding.UTF8.GetBytes($"{Timestamp}-{Data}-{PreviousHash}");
            var outputBytes = sha256.ComputeHash(inputBytes);
            return Convert.ToBase64String(outputBytes);
        }
    }
}