Newtonsoft.Json dependency problem

My project uses Newtonsoft.json V4.5. Now I have a requirement to integrate twitter oAuth into my project.

I decided to use Tweetsharp.dll for integration. Got a Newtonsoft.Json dependency conflict problem that Tweetsharp requires Newtonsoft.json 3.5.

The problem is that I cannot replace my new version of Newtonsoft.Json from my project, as it affects other functions.

Please help me solve this problem.

Server Error in '/' Application.

 Could not load file or assembly 'Newtonsoft.Json, Version=3.5.0.0, Culture=neutral,         PublicKeyToken=30ad4fe6b2a6aeed' or one of its dependencies. The located assembly manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

  Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

  Exception Details: System.IO.FileLoadException: Could not load file or assembly 'Newtonsoft.Json, Version=3.5.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' or one of its dependencies. The located assembly manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

 Source Error: 


 Line 188:            if (CallbackUrl != null && CallbackUrl.Trim().Length > 0)
 Line 189:            {
 Line 190:                twitter =     FluentTwitter.CreateRequest().Configuration.UseHttps().Authentication.GetRequestToken(ConsumerKey, ConsumerSecret, CallbackUrl);
 Line 191:            }
 Line 192:            else

 Source File: C:\Users\hnarikkoden\Desktop\Socxo\B2\App_Start\TwitterInfo.cs    Line: 190 

  Assembly Load Trace: The following information can be helpful to determine why the   assembly 'Newtonsoft.Json, Version=3.5.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' could not be loaded.