Memory corruption with C# [Csharp] bindings

[GeneThomas]

i. version of lib3mf: 2.2.0 ii. operating system: Windows 10 iii. what did you do: Compiled and ran the attached project:

class ThreeMfTest
{
    public static void Main()
    {
        CModel model = Wrapper.CreateModel();

        CColorGroup colorGroupTest = model.AddColorGroup();
        sColor redTest = Wrapper.RGBAToColor(255, 0, 0, 255);
        uint idRedTest = colorGroupTest.AddColor(redTest);
        // throws System.AccessViolationException:
        //   HResult = 0x80004003
        //   Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
    }
}

iv. expected: I expected the code to not throw an exception v. It throws an exception indicating that memory has probably been corrupted.

I shall attach a full solution .sln etc.. so the fault can be reproduced.

[GeneThomas]

3MfTest.zip

Attached is zip file containing C# solution to exercise the fault.

When I am finish I shall have some C# examples translated from C++ that you can add to your package.

[GeneThomas]

lib3MF v2.1.1 and v2.0.0 have the same fault, has the CSharp bindings ever worked?

[rahimshahid]

Having the exact same problem with version 2.2.0 (and older versions as well e.g. 2.1.1, 2.0.1 & 2.1.0).

Problem does not only occur with adding colors, it also occurs once you add a material e.g.

CModel rootModel= Wrapper.CreateModel();
var baseMatGroup = rootModel.AddBaseMaterialGroup();
var darkBlue = Lib3MF.Wrapper.RGBAToColor(20, 20, 90, 255);
baseMatGroup.AddMaterial("material1", darkBlue); // ---> throws the same exception 'Attempted to read or write protected memory. This is often an indication that other memory is corrupt.'

Any idea how to solve this or any Work Around to get the colors working on C# ?