>>I'm wondering if this is the correct way or there is a better and simpler way.

Your code is correct and simple as for me.

I would write something like this:

foreach (SqlWhereBuilderCondition condition in this.SqlWhereBuilderPeople.Conditions)
{
if (condition.FieldId.Equals("IsActive"))
{
// Remove IsActive part in case we selected that condition - very rare case
RemoveIsActivePart = true;
}
}



>>BTW, are you using this class in your project as well?

No, I just downloaded it from codeproject now to see source code.
Maybe it will be useful in some project.