HttpWebRequest Error The server submitted a protocol violation. Section=responseheader DETAIL=CR back must be LF

The server submitted a protocol violation. Section=responseheader DETAIL=CR back must be LF

The server committed a protocol violation. Section=responseheader DETAIL=CR must is followed by LF

The main meaning is that Microsoft does not tolerate a server response that does not conform to the provisions of RFC 822 that Httpheader must end with CRLF.

One solution is to add a application.config or Web. config file

<system.net>

<settings>


</settings>

</system.net>

Allow the system to tolerate (tolerant) hearder information that ends in CR or LF only

Using System.Reflection;

        BOOLgetallowunsafeheaderparsing () {//Get The assembly that contains the internal classAssembly anetassembly = assembly.getassembly (typeof(System.Net.Configuration.SettingsSection)); if(anetassembly! =NULL)            {                //Use the assembly in order to get the internal type for//The internal classType Asettingstype = Anetassembly.gettype ("System.Net.Configuration.SettingsSectionInternal"); if(Asettingstype! =NULL)                {                    //Use the internal static property to get an instance//of the internal settings class. If the static instance//isn ' t created allready the property would create it for us.                    ObjectAninstance = Asettingstype.invokemember (" Section", BindingFlags.Static|BindingFlags.GetProperty| BindingFlags.NonPublic,NULL,NULL,New Object[] { }); if(Aninstance! =NULL)                    {                        //Locate the private bool field that tells the//Framework is unsafe header parsing should be//allowed or notFieldInfo auseunsafeheaderparsing =Asettingstype.getfield ("useunsafeheaderparsing", BindingFlags.NonPublic|bindingflags.instance); if(Auseunsafeheaderparsing! =NULL)                            return(BOOL) Auseunsafeheaderparsing.getvalue (aninstance); }                }            }            return false; }        voidSetallowunsafeheaderparsing (BOOLval) {            //Get The assembly that contains the internal classAssembly anetassembly = assembly.getassembly (typeof(System.Net.Configuration.SettingsSection)); if(anetassembly! =NULL)            {                //Use the assembly in order to get the internal type for//The internal classType Asettingstype = Anetassembly.gettype ("System.Net.Configuration.SettingsSectionInternal"); if(Asettingstype! =NULL)                {                    //Use the internal static property to get an instance//of the internal settings class. If the static instance//isn ' t created allready the property would create it for us.                    ObjectAninstance = Asettingstype.invokemember (" Section", BindingFlags.Static|BindingFlags.GetProperty| BindingFlags.NonPublic,NULL,NULL,New Object[] { }); if(Aninstance! =NULL)                    {                        //Locate the private bool field that tells the//Framework is unsafe header parsing should be//allowed or notFieldInfo auseunsafeheaderparsing =Asettingstype.getfield ("useunsafeheaderparsing", BindingFlags.NonPublic|bindingflags.instance); if(Auseunsafeheaderparsing! =NULL) {Auseunsafeheaderparsing.setvalue (Aninstance, Val); }                    }                }            }        }

HttpWebRequest Error The server submitted a protocol violation. Section=responseheader DETAIL=CR back must be LF