Failing tests with .NET 4.8

[NN---]

System.NullReferenceException : Object reference not set to an instance of an object.
   at Vanara.InteropServices.IntPtrConverter.Convert(IntPtr ptr, UInt32 sz, Type destType, CharSet charSet) in Vanara\Core\InteropServices\IntPtrConverter.cs:line 46
   at Vanara.PInvoke.Collections.UntypedNativeMemoryEnumerator.get_Current() in Vanara\Core\Collections\NativeMemoryEnumerator.cs:line 90
   at Vanara.PInvoke.Collections.NativeMemoryEnumerator`1.get_Current() in Vanara\Core\Collections\NativeMemoryEnumerator.cs:line 25
   at Vanara.Extensions.Tests.InteropExtensionsTests.ToIEnumTest() in Vanara\UnitTests\Core\Extensions\InteropExtensionsTests.cs:line 203

System.NullReferenceException : Object reference not set to an instance of an object.
   at Vanara.InteropServices.IntPtrConverter.Convert(IntPtr ptr, UInt32 sz, Type destType, CharSet charSet) in Vanara\Core\InteropServices\IntPtrConverter.cs:line 46
   at Vanara.PInvoke.Collections.UntypedNativeMemoryEnumerator.get_Current() in Vanara\Core\Collections\NativeMemoryEnumerator.cs:line 90
   at Vanara.PInvoke.Collections.NativeMemoryEnumerator`1.get_Current() in Vanara\Core\Collections\NativeMemoryEnumerator.cs:line 25
   at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
   at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
   at Vanara.Extensions.Tests.InteropExtensionsTests.MarshalToPtrTest3() in Vanara\UnitTests\Core\Extensions\InteropExtensionsTests.cs:line 147

[ljani]

I'm on .NET Core 3.1.301 and for example EnumServicesStatusEx returns fails with System.NullReferenceException as well.

[dahall]

@NN--- : I have fixed these (see notes on commits)
@ljani : What parameters are causing that error?

[ljani]

Both EnumServicesStatusEx(manager, AdvApi32.ServiceTypes.SERVICE_WIN32, AdvApi32.SERVICE_STATE.SERVICE_STATE_ALL) and EnumServicesStatusEx(manager, AdvApi32.ServiceTypes.SERVICE_TYPE_ALL, AdvApi32.SERVICE_STATE.SERVICE_STATE_ALL) fail.

Copy pasting the code and changing mem.ToEnumerable<ENUM_SERVICE_STATUS_PROCESS> to mem.ToArray<ENUM_SERVICE_STATUS_PROCESS> fixes the issue for me.