AIMA.Core.Search.CSP.BacktrackingStrategy.selectUnassignedVariable C# (CSharp) Method

        protected Variable selectUnassignedVariable(Assignment assignment, CSP csp)
        {
            foreach (Variable var in csp.getVariables())
            {
                if (!(assignment.hasAssignmentFor(var)))
                    return var;
            }
            return null;
        }