# MonoGame SharpDX Error 'The Parameter is Incorrect' when using graphics.DrawUserPrimitives [closed]

Below is a small section of code that is meant to draw a multicolored triangle to the middle of the screen in a MonoGame game. This uses the basic function DrawUserPrimitives to draw the triangle. This works fine in XNA, but the moment i try to use it in a MonoGame DX game (Which compiles using SharpDX) it will crash with the following error:

An unhandled exception of type 'SharpDX.SharpDXException' occurred in SharpDX.dll

Additional information: HRESULT: [0x80070057], Module: [General], ApiCode: [E_INVALIDARG/Invalid Arguments], Message: The parameter is incorrect.

Below is the code that is causing the error.

private void SetUpVertices() {
vertices = new VertexPositionColor[3];

vertices[0].Position = new Vector3(-0.5f, -0.5f, 0f);
vertices[0].Color = Color.Red;
vertices[1].Position = new Vector3(0, 0.5f, 0f);
vertices[1].Color = Color.Green;
vertices[2].Position = new Vector3(0.5f, -0.5f, 0f);
vertices[2].Color = Color.Yellow;
}

public void Draw(GameTime gameTime) {
gDevice.DrawUserPrimitives(PrimitiveType.TriangleList, vertices, 0, 1, VertexPositionColor.VertexDeclaration);
}


Has anyone ever come across simillar errors using the DirectX version on MonoGame and SharpDX when dealing with primatives? And do you know of a way I can fix this issue?