To everyone having problems with Newtonsoft.Json v4.5 version try using this in web.config or app.config:
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="Newtonsoft.Json"
publicKeyToken="30AD4FE6B2A6AEED" culture="neutral"/>
<bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0"/>
</dependentAssembly>
</assemblyBinding>
</runtime>
IMPORTANT: Check that the configuration
tag of your config file has no namespace attribute (as suggested in https://stackoverflow.com/a/12011221/150370). Otherwise, assemblyBinding
tags will be ignored.