private void PopulatePropertyList(List <PropertyConfig> propertyList,
PropertySystemNativeMethods.PropDescEnumFilter filter)
{
propertyList.Clear();
IPropertyDescriptionList propertyDescriptionList = null;
IPropertyDescription propertyDescription = null;
Guid guid = new Guid(ShellIIDGuid.IPropertyDescriptionList);
try
{
var hr = PropertySystemNativeMethods.PSEnumeratePropertyDescriptions(
filter, ref guid, out propertyDescriptionList);
if (hr >= 0)
{
propertyDescriptionList.GetCount(out uint count);
guid = new Guid(ShellIIDGuid.IPropertyDescription);
for (uint i = 0; i < count; i++)
{
propertyDescriptionList.GetAt(i, ref guid, out propertyDescription);
if (propertyDescription != null)
{
var shellProperty = new ShellPropertyDescription(propertyDescription);
var pc = new PropertyConfig(shellProperty);
shellProperty.Dispose(); // Releases propertyDescription
propertyDescription = null;
GetInstalledProperty(pc, true); // Add search and alias info
propertyList.Add(pc);
DictInstalledProperties.Add(pc.CanonicalName, pc);
}
}
}
}
finally
{
if (propertyDescriptionList != null)
{
Marshal.ReleaseComObject(propertyDescriptionList);
}
if (propertyDescription != null)
{
Marshal.ReleaseComObject(propertyDescription);
}
}
}
public bool UnregisterCustomProperty(string canonicalName)
{
// The file is held in a more protected common area away from the editor
var targetFolder = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData),
"CustomWindowsProperties");
var targetFileName = $"{targetFolder}{Path.DirectorySeparatorChar}{canonicalName}.propdesc";
if (!File.Exists(targetFileName))
{
throw new Exception($"Installed property configuration file {targetFileName} is missing");
}
var result = PropertySystemNativeMethods.PSUnregisterPropertySchema(targetFileName);
if (result == 0)
{
File.Delete(targetFileName);
return(true);
}
MessageBox.Show($"Property unregistration failed with error code 0x{result:x}", "Error uninstalling property");
return(false);
}