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Asked: 2026-05-11T07:51:02+00:00

System.Exception: There was an error reading the city list for CANANDA —> System.ArgumentException: Unrecognized

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System.Exception: There was an error reading the city list for CANANDA —> System.ArgumentException: Unrecognized escape sequence. (1056): 

{code: 'CA',cities: [{name: 'Abbotsford',lat: 49029998,lon: -122370002},{name: 'Calgary',lat: 51119998,lon: -114019996},{name: 'Edmonton',lat: 53299999,lon: -113580001},{name: 'Halifax',lat: 44880001,lon: -63500000},{name: 'Hamilton',lat: 43279998,lon: -79900001},{name: 'Kanata',lat: 45319999,lon: -75669998},{name: 'Kelowna',lat: 49970001,lon: -119379997},{name: 'Kingston',lat: 44220001,lon: -76599998},{name: 'London',lat: 43029998,lon: -81150001},{name: 'Mississauga',lat: 43630001,lon: -79400001},{name: 'Moncton',lat: 46119998,lon: -64680000},{name: 'Montreal',lat: 45470001,lon: -73750000},{name: 'Oshawa',lat: 43630001,lon: -79400001},{name: 'Ottawa',lat:45319999,lon: -75669998},{name: 'Peterborough',lat: 44229999,lon: -78370002},{name: 'Prince George',lat: 53880001,lon: -122680000},{name: 'Quebec',lat: 46799999,lon: -71379997},{name: 'Regina',lat: 50430000,lon: -104669998},{name: 'Saint John',lat: 45319999,lon: -65879997},{name: 'Saskatoon',lat: 52169998,lon: -106680000},{name: 'Sherbrooke',lat: 45430000,lon: -71680000},{name: 'St John\x27s',lat: 47619998,lon: -52729999},{name: 'Sydney',lat: 46169998,lon: -60049999},{name: 'Thunder Bay',lat: 48369998,lon: -89319999},{name: 'Toronto',lat: 43630001,lon: -79400001, selected: true},{name: 'Trois-Rivieres',lat: 46349998,lon: -72519996},{name: 'Vancouver',lat: 49180000,lon: -123169998},{name: 'Victoria',lat: 48650001,lon: -123430000},{name: 'Windsor',lat: 42270000,lon: -82970001},{name: 'Winnipeg',lat: 49900001,lon: -97230003}]}

I think it’s the name ‘St John\x27s’ that is causing the exception. Does that mean the System.Web.Extensions JavaScriptSerializer doesn’t support Unicode?

Or is that actually invalid JSON?

How can I fix this problem?

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1 Answer

  1. \x27 is invalid JSON. Replace it with \u0027.

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