OpenTK - Useability of Accumulation Buffer

Question

I'm trying to use accumulation buffer in OpenTK project to no avail.

I learned that in newer version of OpenGL it was removed so I was wondering if its usable in OpenTK and if yes then is it dependent on:

1. Libary im using - im currently using OpenTK.Graphics.OpenGL.
2. The version of OpenGL set in shaders for example:

#version 330

in vec3 vPosition;
in  vec3 vColor;
out vec4 color;
uniform mat4 modelview;

void
main()
{
    gl_Position = modelview * vec4(vPosition, 1.0);

    color = vec4( vColor, 1.0);
}

If any of this is at fault of not letting me use accum buffer then it will probably solve this question of mine too

OpenTK - How to achive antialiasing using accumulation buffer

Answer 1

If deprecated functionality is still available, depends on the OpenGL Context type.

If you use a compatibility profile OpenGL Context, then all the deprecated functionality, as a accumulation buffer, is still available, even in the most resent OpenGL version 4.6.
In a core profile OpenGL context, the deprecated functionality is removed.

By default OpenTK creates a compatibility profile OpenGL context.