public virtual ulong GetHash()
{
ulong hashCode = 0uL;
unchecked
{
if (LeftOperand != null)
{
hashCode += 1000000007 * LeftOperand.GetHash();
}
if (RightOperand != null)
{
hashCode += 1000000009 * RightOperand.GetHash();
}
hashCode += 1000000021 * (ulong)OperatorToken;
}
return(hashCode);
}