c# how could i parse this file to key value pair

ok what im trying to do is load this file in this stucture 

"anim template" "anim fileds""angleError" "0.05""boneStabilizers" """customnote0action" "None""customnote0actionparam1" """customnote0actionparam2" """customnote0frame" "1""customnote0useexistingnote" """filename" "elfenliedtopfan5_anims\\elf_bo3_pdw\\elf_cp_bo2_pdw_ads_down.xanim_bin""fx_customnote0action" "None""fx_customnote0actionparam1" """fx_customnote0actionparam2" """fx_customnote0frame" "1""fx_customnote0useexistingnote" """fx_shutdownnote0action" "None""fx_shutdownnote0actionparam1" """fx_shutdownnote0actionparam2" """fx_startupnote0action" "None""fx_startupnote0actionparam1" """fx_startupnote0actionparam2" """ignoreSpineBones" "0""leftHandGripIK" "0""looping" "0""loopsync" "0""model" "corpse_party_weapons_bo3\\t6_wpn_smg_pdw57_view\\elf_pdw_animated.xmodel_bin""node" """previewAlignChildTag" """previewAlignParentTag" """previewAttachModel" """previewModel" """shutdownnote0action" "None""shutdownnote0actionparam1" """shutdownnote0actionparam2" """sound_customnote0action" "None""sound_customnote0actionparam1" """sound_customnote0actionparam2" """sound_customnote0frame" "1""sound_customnote0useexistingnote" """sound_shutdownnote0action" "None""sound_shutdownnote0actionparam1" """sound_shutdownnote0actionparam2" """sound_startupnote0action" "None""sound_startupnote0actionparam1" """sound_startupnote0actionparam2" """startupnote0action" "None""startupnote0actionparam1" """startupnote0actionparam2" """translationError" "0.025""type" "relative""useBones" "0""useNtExportFile" "0"

and split it into key value pairs like say 

"angleError" "0.05"

key value key being "angleError"

value being "0.05"

but not sure how to accumplish this i have tryied 

        string elf = @"‪C:\Users\elfenliedtopfan5\Desktop\elf_peogram_template\weapon_template.gdt";
        public void testfunc()
        {

            Dictionary<String, String> dict = new Dictionary<String, String>();
            using (StreamReader rdr = new StreamReader(File.OpenRead(elf)))
            {

                String line;
                while ((line = rdr.ReadLine()) != null)
                {


                    Int32 spaceIdx = line.IndexOf(' ');
                    if (spaceIdx == 0 || spaceIdx == -1) continue;

                    String key = line.Substring(0, spaceIdx - 1);
                    String value = line.Substring(spaceIdx);

                    dict.Add(key, value);
                }
            }
        }

but for some reason it tells me sorry this text format is not supported