如何提高c＃程序的性能

Question

我正在尝试从地理数据库中提取sdf文件。随着新的sdf文件的创建，程序的内存使用量增加。为了解决这个问题，我尝试重新连接sdf文件，并尝试使用GC释放资源.Collect（）方法但问题仍然存在。

/// <summary>
/// Get feature data from geodatabase file
/// </summary>
/// <param name="dictionaryProperty"> Schema of table </param>
/// <param name="table">table connection of gdb file</param>
/// <param name="sdffilepath">sdf file path</param>
static void GetFeatureData(Dictionary<string, Property> dictionaryProperty, Table table, string sdffilepath)
{
    int filecount = 1; ;
    List<Property> propertyList = new List<Property>();
    IEnumerable<string> propertycoll = dictionaryProperty.Select(i => i.Value).Where(i => i.DataType == "OID").ToList().Select(i => i.PropertyName);
    string propertyname = null;
    foreach (string item in propertycoll)
    {
        propertyname = item;
    }
    for (int rowNo = 1; rowNo <= table.RowCount; rowNo++)
    {
        foreach (Row row in table.Search("*", propertyname + "=" + rowNo.ToString(), RowInstance.Recycle))
        {
            foreach (Property property in dictionaryProperty.Values)
            {
                Property objproperty = new Property();
                objproperty.PropertyName = property.PropertyName;
                objproperty.DataType = property.DataType;
                switch (property.DataType)
                {
                    case "SmallInteger":
                        if (row.IsNull(property.PropertyName))
                        {
                            objproperty.PropertyData = "";
                        }
                        else
                        {
                            objproperty.PropertyData = row.GetShort(property.PropertyName).ToString();
                        }
                        break;

                    case "Geometry":
                        switch (row.GetGeometry().geometryType.ToString())
                        {
                            case "Point":
                                PointShapeBuffer pointGeometry = row.GetGeometry();
                                objproperty.GeometryType = property.GeometryType;
                                objproperty.GeometryData = pointGeometry.point.x + " " + pointGeometry.point.y;
                                break;

                                objproperty.GeometryData = coord;
                                objproperty.PropertyData = coord;
                                objproperty.GeometryType =   property.GeometryType;
                                coord = string.Empty;
                                break;
                            case "Polygon":

                                break;
                        }
                        break;
                    case "GlobalID":

                        break;
                }
                propertyList.Add(objproperty);
            }
            InsertFeatureData(table, propertyList, sdffilepath);
            propertyList.Clear();
        }
    }
    Console.WriteLine(filecount + "file completed");
    filecount++;
}
/// <summary>
/// Insert feature data to sdf file path
/// </summary>
/// <param name="table"></param>
/// <param name="propertyList">Schema defination</param>
/// <param name="sdffilepath"></param>
static void InsertFeatureData(Table table, List<Property> propertyList, string sdffilepath)
{
    IConnection con = OpenFDOSDFConnection(sdffilepath);
    IInsert insertCommand = (IInsert)con.CreateCommand(OSGeo.FDO.Commands.CommandType.CommandType_Insert);
    insertCommand.SetFeatureClassName(GetTableName(table));
    foreach (Property objProperty in propertyList)
    {
        switch (objProperty.DataType)
        {
            case "OID":
                if (!string.IsNullOrEmpty(objProperty.PropertyData))
                {
                    insertCommand.PropertyValues.Add(new PropertyValue(objProperty.PropertyName, new Int64Value(Convert.ToInt64(objProperty.PropertyData))));
                }
                else
                {
                    insertCommand.PropertyValues.Add(new PropertyValue(objProperty.PropertyName, null));
                }
                break;

            case "Geometry":
                switch (objProperty.GeometryType)
                {
                    case "Point":
                        if (!(objProperty.GeometryData == ""))
                        {
                            FgfGeometryFactory factory = new FgfGeometryFactory();
                            DirectPositionCollection pcollection = new DirectPositionCollection();
                            string[] points = objProperty.GeometryData.Split();
                            insertCommand.PropertyValues.Add(new PropertyValue("Geometry", new GeometryValue(factory.GetFgf(factory.CreatePoint(factory.CreatePositionXY(Convert.ToDouble(points[0]), Convert.ToDouble(points[1])))))));
                        }   
        }
    }
    insertCommand.Execute();
    insertCommand.Dispose();
    con.Close();
}