c# - Newtonsoft.Json Assembly Conflict -

i use netonsoft.json in project. works fine until start integrating paypal sdk in project. code below.

         string accesstoken =   new paypal.oauthtokencredential("", "").getaccesstoken(); ---->>>> line throwing error             paypal.api.payments.address add = new paypal.api.payments.address();             add.city = textboxcity.text;             add.line1 = textboxaddress.text;             add.phone = textboxphonenumber.text;             add.postal_code = textboxzipcode.text;             add.state = textboxstate.text;             paypal.api.payments.creditcard cc = new paypal.api.payments.creditcard();             cc.number = textboxcreditcardnumber.text;             cc.first_name = textboxfirstname.text;             cc.last_name = textboxlastname.text;             cc.expire_month = convert.toint16(textboxexpirymonth.text);             cc.expire_year = convert.toint16(textboxexpiryyear.text);             cc.cvv2 = textboxcvvnumber.text;             cc.billing_address = add;             cc.create(accesstoken); 

and error below

       system.io.fileloadexception: not load file or assembly 'newtonsoft.json, version=4.5.0.0, culture=neutral, publickeytoken=30ad4fe6b2a6aeed' or 1 of dependencies. located assembly's manifest definition not match assembly reference. (exception hresult: 0x80131040) 

i search on internet , found solution change config file. change config file below

        <assemblybinding xmlns="urn:schemas-microsoft-com:asm.v1">   <dependentassembly>     <assemblyidentity name="newtonsoft.json" publickeytoken="30ad4fe6b2a6aeed" culture="neutral"/>      <bindingredirect oldversion="0.0.0.0-3.5.0.0" newversion="4.5.0.0" />   </dependentassembly> </assemblybinding> 

i play around assembly properties copy local, specific version nothing helps me solve this. how can solve assembly conflict?

i had same problem , solved updating newtonsoft.json latest version using

update-package newtonsoft.json 

and going web.config , adding:

<dependentassembly>     <assemblyidentity name="newtonsoft.json" publickeytoken="30ad4fe6b2a6aeed"/>     <bindingredirect oldversion="0.0.0.0-4.5.0.0" newversion="5.0.8"/> </dependentassembly>