Solid Edge read custom properties

private void button1_Click(object sender, EventArgs e)
        {
            SolidEdgeFileProperties.PropertySets propertySets = null;
            SolidEdgeFileProperties.Properties properties = null;
            SolidEdgeFileProperties.Property property = null;
            string format1 = "[{0}]";
            string format2 = "{0} = {1}";
            try
            {
                // Create new instance of the PropertySets object
                propertySets = new SolidEdgeFileProperties.PropertySets();
                // Open a file
                propertySets.Open(Directory.GetCurrentDirectory() + @"\327935-01.par", true);
                // Example: Loop through all properties
                // Note that indexes are zero based
                for (int i = 0; i < propertySets.Count; i++)
                {
                    properties = (SolidEdgeFileProperties.Properties)propertySets[i];
                    // Note that indexes are zero based
                    for (int j = 0; j < properties.Count; j++)
                    {
                        property = (SolidEdgeFileProperties.Property)properties[j];
                        try
                        {
                            Console.WriteLine(
                            string.Format(
                            format2, property.Name, property.Value));
                        }
                        catch
                        {
                            Console.WriteLine(
                            string.Format(
                            format2, property.Name, "ERROR"));
                        }
                    }
                }
                // Get a reference to the SummaryInformation properties
                properties = (SolidEdgeFileProperties.Properties)
                propertySets["SummaryInformation"];
                // Get a reference to the Title property by name
                property = (SolidEdgeFileProperties.Property)
                properties["Title"];
            }
            catch (System.Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
            finally
            {
                if (property != null)
                {
                    Marshal.ReleaseComObject(property);
                    property = null;
                }
                if (properties != null)
                {
                    Marshal.ReleaseComObject(properties);
                    properties = null;
                }
                if (propertySets != null)
                {
                    propertySets.Close();
                    Marshal.ReleaseComObject(propertySets);
                    propertySets = null;
                }
            }
        }