/// <summary>
/// Returns a hash code for this instance.
/// </summary>
/// <returns>
/// A hash code for this instance, suitable for use in hashing algorithms and data structures like a hash table.
/// </returns>
public override int GetHashCode()
{
unchecked
{
return(((RootNodes != null ? RootNodes.GetHashCode() : 0) * 397) ^ (ExpressionString != null ? ExpressionString.GetHashCode() : 0));
}
}
