private void PlatformDrawPrimitives(PrimitiveType primitiveType, int vertexStart, int vertexCount)
 {
     BindVertexBuffer(false);
     _graphics.DrawArrays(PSSHelper.ToDrawMode(primitiveType), vertexStart, vertexCount);
 }
 private void PlatformDrawIndexedPrimitives(PrimitiveType primitiveType, int baseVertex, int startIndex, int primitiveCount)
 {
     BindVertexBuffer(true);
     PlatformApplyState(true);
     _graphics.DrawArrays(PSSHelper.ToDrawMode(primitiveType), startIndex, GetElementCountArray(primitiveType, primitiveCount));
 }