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public void Initialize(System.Collections.Hashtable properties) {    \_inputExchangeItems = new ArrayList(); //ArrayList of    Oatc.OpenMI.Sdk.Backbone.InputExchangeItem objects    \_outputExchangeItems = new ArrayList(); //ArrayList of    Oatc.OpenMI.Sdk.Backbone.OutputExchangeItem objects    // \-\\- Create and initialize the engine \-\\-    \_simpleRiverEngine = new SimpleRiverEngineDotNetAccess();    \_simpleRiverEngine.Initialize((string)properties\['FilePath'\]);    // \-\\- Simulation start time -    // The start time is obtained from the engine core as a string. This string is    // passed and converted to a System.DateTime. Then the    // Oatc.OpenMI.Sdk.DevelopmentSupport.CalendarConverter class is used to convert    // this time into the ModifiedJulianDay (this is the OpenMI standard time)    char \[\] delimiter = new char\[\]{'-',' ',':'};    string\[\] strings = \_simpleRiverEngine.GetSimulationStartDate().Split(delimiter);    int StartYear = Convert.ToInt32(strings\[0\]);    int StartMonth = Convert.ToInt32(strings\[1\]);    int StartDay = Convert.ToInt32(strings\[2\]);    int StartHour = Convert.ToInt32(strings\[3\]);    int StartMinute = Convert.ToInt32(strings\[4\]);    int StartSecond = Convert.ToInt32(strings\[5\]);    DateTime startDate = new DateTime(StartYear,StartMonth,StartDay,StartHour,StartMinute,StartSecond);    \_simulationStartTime = Oatc.OpenMI.Sdk.DevelopmentSupport.CalendarConverter.Gregorian2ModifiedJulian(startDate);    // \-\\- Build exchange items \--\\-    Dimension flowDimension = new Dimension();    Unit flowUnit = new Unit('m3/sec',1,0,'m3/sec'); //The Simple River only uses    // quantities with the unit m3/sec.    Quantity flowQuantity = new Quantity(flowUnit,'description','Flow',    OpenMI.Standard.ValueType.Scalar,flowDimension);    Quantity inFlowQuantity = new Quantity(flowUnit,'description','InFlow',    OpenMI.Standard.ValueType.Scalar,flowDimension);    int numberOfNodes = \_simpleRiverEngine.GetNumberOfNodes();    for (int i = 0; i < numberOfNodes \-1; i++) //For each branch    {       OutputExchangeItem flowFromBranch = new OutputExchangeItem();       InputExchangeItem inFlowToBranch = new InputExchangeItem();       // One ElementSet is created for each branch. The ElementID's are       // Branch:<Branch number>. E.g. 'Branch:3'       ElementSet branch = new ElementSet('description','Branch:' + i.ToString(),ElementType.XYPolyLine,new SpatialReference('ref'));       branch.AddElement(new Element('Branch:' + i.ToString()));       branch.Elements\[0\].AddVertex(new Vertex(_simpleRiverEngine.       GetXCo-ordinate(i),_simpleRiverEngine.GetYCo-ordinate(i),0));       branch.Elements\[0\].AddVertex(new Vertex(_simpleRiverEngine.       GetXCo-ordinate(i+1),_simpleRiverEngine.GetYCo-ordinate(i+1),0));       flowFromBranch.ElementSet = branch;       flowFromBranch.Quantity = flowQuantity;       inFlowToBranch.ElementSet = branch;       inFlowToBranch.Quantity = inFlowQuantity;       \_outputExchangeItems.Add(flowFromBranch);       \_inputExchangeItems.Add(inFlowToBranch);    }    for (int i = 0; i < numberOfNodes; i++) //For all nodes    {       InputExchangeItem inflowToNode = new InputExchangeItem();       // Each node is a ID-based ElementSet. The ElementSet ID are       // Node:<node number>. E.g. 'Node:3'       ElementSet node = new ElementSet('description','Node:' +       i.ToString(),ElementType.IDBased,new SpatialReference('ref'));       node.AddElement(new Element('Node:' + i.ToString()));       inflowToNode.Quantity = inFlowQuantity;       inflowToNode.ElementSet = node;      \_inputExchangeItems.Add(inflowToNode);    }    ElementSet Branches = new ElementSet('description','AllBranches',    ElementType.XYPolyLine,new SpatialReference('ref'));    for (int i = 0; i < numberOfNodes - 1;i++) //Create an InputExchangeItem that    // has all branches in one ElementSet    {       Element branch = new Element('Branch: ' + i.ToString());       branch.AddVertex(new Vertex(_simpleRiverEngine.       GetXCo-ordinate(i),_simpleRiverEngine.GetYCo-ordinate(i),0));       branch.AddVertex(new Vertex(_simpleRiverEngine.       GetXCo-ordinate(i+1),_simpleRiverEngine.GetYCo-ordinate(i+1),0));       Branches.AddElement(branch);    }    InputExchangeItem inFlowToBranches = new InputExchangeItem();    inFlowToBranches.ElementSet = Branches;    inFlowToBranches.Quantity = inFlowQuantity;    \_inputExchangeItems.Add(inFlowToBranches); }