From 983631dddbdb2892d8715e8e565dbb33017c277f Mon Sep 17 00:00:00 2001
From: Laurent Perron <lperron@google.com>
Date: Thu, 2 Nov 2023 04:11:45 +0100
Subject: [PATCH] new model_builder C# sample

---
 .../samples/SimpleMipProgramMb.cs             | 85 +++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 ortools/linear_solver/samples/SimpleMipProgramMb.cs

diff --git a/ortools/linear_solver/samples/SimpleMipProgramMb.cs b/ortools/linear_solver/samples/SimpleMipProgramMb.cs
new file mode 100644
index 0000000000..fe0a81ac43
--- /dev/null
+++ b/ortools/linear_solver/samples/SimpleMipProgramMb.cs
@@ -0,0 +1,85 @@
+// Copyright 2010-2022 Google LLC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Minimal example to call the SCIP solver.
+// [START program]
+// [START import]
+using System;
+using Google.OrTools.ModelBuilder;
+// [END import]
+
+public class SimpleMipProgramMb
+{
+    static void Main()
+    {
+        // [START model]
+        // Create the model builder.
+        ModelBuilder model = new ModelBuilder();
+        // [END model]
+
+        // [START variables]
+        // Create the variables x and y.
+        Variable x = model.NewIntVar(0.0, double.PositiveInfinity, "x");
+        Variable y = model.NewIntVar(0.0, double.PositiveInfinity, "y");
+
+        Console.WriteLine("Number of variables = " + model.VariablesCount());
+        // [END variables]
+
+        // [START constraints]
+        // x + 7 * y <= 17.5.
+        model.Add(x + 7 * y <= 17.5);
+
+        // x <= 3.5.
+        model.Add(x <= 3.5);
+
+        Console.WriteLine("Number of constraints = " + model.ConstraintsCount());
+        // [END constraints]
+
+        // [START objective]
+        // Maximize x + 10 * y.
+        model.Maximize(x + 10 * y);
+        // [END objective]
+
+        // [START solver]
+        // Create the model solver with the GLOP backend.
+        ModelSolver solver = new ModelSolver("SCIP");
+        if (!solver.SolverIsSupported())
+        {
+            return;
+        }
+        // [END solver]
+
+        // [START solve]
+        var resultStatus = solver.Solve(model);
+        // [END solve]
+
+        // [START print_solution]
+        // Check that the problem has an optimal solution.
+        if (resultStatus != SolveStatus.OPTIMAL)
+        {
+            Console.WriteLine("The problem does not have an optimal solution!");
+            return;
+        }
+        Console.WriteLine("Solution:");
+        Console.WriteLine("Objective value = " + solver.ObjectiveValue);
+        Console.WriteLine("x = " + solver.Value(x));
+        Console.WriteLine("y = " + solver.Value(y));
+        // [END print_solution]
+
+        // [START advanced]
+        Console.WriteLine("\nAdvanced usage:");
+        Console.WriteLine("Problem solved in " + solver.WallTime + " milliseconds");
+        // [END advanced]
+    }
+}
+// [END program]