関連ワード:  no parameterless constructor defined for type of 'system.string'    no parameterless constructor defined for type of system string c#    no parameterless constructor defined for type of system string during json deserialization    system missingmethodexception no parameterless constructor defined for type of system string    no parameterless constructor defined for system string  
結果 : no parameterless constructor defined for type of 'system.string'