How to get multiple goals in Microsoft.SolverFoundation.Solvers

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C#

.NET

In this code, the system equation have two solutions, but method GetNext() not find other result. So, the code only gives one solution.

Can someone say me how to obtain the two solutions, please?
Thank you for all

SolverContext context = SolverContext.GetContext();
Model model = context.CreateModel();

Decision X = new Decision(Domain.Real, "X");
Decision Y = new Decision(Domain.Real, "Y");
model.AddDecision(X);
model.AddDecision(Y);
model.AddConstraint("eq0", "(X-3)^2+(Y-4)^2 == 2^2");
model.AddConstraint("eq1", "(X-6)^2+(Y-4)^2 == 2^2");

Solution solution = context.Solve(new Directive() { TimeLimit = 20000 });

var a = X.GetDouble();
var b = Y.GetDouble();

solution.GetNext();
            
a = X.GetDouble();
b = Y.GetDouble();