//Block Constructor.
public Block(String data, String previousHash)
{
this.data = data;
this.previousHash = previousHash;
this.timeStamp = Datetime.GetTime();
this.hash = CalculateHash();
}
public Block(int height, string previousHash, Transaction transaction, string creator)
{
this.height = height;
this.previousHash = previousHash;
this.timeStamp = Datetime.GetTime();
this.transaction = transaction;
this.hash = CalculateHash();
this.Creator = creator;
}