private static bool CreateLockFree(bool suppressCOMExceptions = true, bool suppressOtherExceptions = true)
{
if (Singleton.ComFactory != null)
{
try
{
Marshal.ReleaseComObject(Singleton.ComFactory);
}
catch
{
// do nothing
}
Singleton.ComFactory = null;
}
bool success = false;
ISpellCheckerFactory result = null;
try
{
result = new SpellCheckerFactoryClass();
success = true;
}
catch (COMException) when(suppressCOMExceptions)
{
// do nothing
}
catch (UnauthorizedAccessException uae)
{
// Sometimes, COM initialization can throw UnauthorizedAccessException
// We will treat it the same as COMException
if (!suppressCOMExceptions)
{
throw new COMException(string.Empty, uae);
}
}
catch (InvalidCastException icex)
{
// Sometimes, InvalidCastException is thrown when SpellCheckerFactory fails to instantiate correctly
// We will treat it as if it were a COM Exception and translate it to one.
if (!suppressCOMExceptions)
{
throw new COMException(string.Empty, icex);
}
}
catch (Exception e) when(suppressOtherExceptions && !(e is COMException) && !(e is UnauthorizedAccessException))
{
// do nothing
}
if (success)
{
Singleton.ComFactory = result;
}
return(success);
}
public void CanCreateSpellChecker_Regression_core_1994()
{
// regression test for https://github.com/dotnet/core/issues/1994
// ensure that we can create this object which implements IClassFactory2
// we're mainly concerned that we don't AV
try
{
var spellCheck = new SpellCheckerFactoryClass();
}
catch (InvalidCastException)
{ }
}
