How to use Gurobi Solver

public static GRBEnv env; //Set up The Environment

public static void initialize()

        {

            env = new GRBEnv("mip1.log");

            env.Set(GRB.IntParam.LogToConsole, 0);

            init = true;

        }

 GRBModel model = new GRBModel(env); //Set up The Model

 sv.decisionVar = model.AddVar(0.0, 1.0, 0.0, GRB.BINARY, sv.decisionVarName); //Create Decision Var

model.Update(); //Update the model after adding variable

GRBLinExpr decisionVarExpr =null;

If(i==0){

decisionVarExpr=decisionvar;

}else{

           decisionVarExpr.AddTerm(1, decisionvar);//Accumulate Decision Var

}

 model.AddConstr(decisionVarExpr == 1, "decision" + j);//Add Constraint

GRBLinExpr objectiveFunction=..

 model.SetObjective(objectiveFunction, GRB.MAXIMIZE); //Set Objective Function

 model.Optimize();//Optimize it

  int status = model.Get(GRB.IntAttr.Status); //Get the overall Status

            if (status == GRB.Status.INFEASIBLE)

            {

                resultString = "";

                return false;

            }

objectiveFunction.Value // See the value of Objective function

decisionVar.Get(GRB.DoubleAttr.X).ToString() == "1" // See the value of a decision variable that has been created before