connect .net MVC application with dynamic 365 CRM using OAuth type connection string
open web.config/app.config
go to configuration > connection string then add following connection string
in you c# code use configuration manager to access the connection string
<add name="MyCRMServer"
connectionString="
AuthType=OAuth;
Username=jsmith;
Password=passcode;
Url=https://contoso:8080/Test;
AppId=51f81489-12ee-4a9e-aaae-a2591f45987d;
RedirectUri=app://58145B91-0C36-4500-8554-080854F2AC97;
TokenCacheStorePath=c:\MyTokenCache; //this line is optional
LoginPrompt=Auto"/>