I have a c# code.(which is exported from selenium IDE)
using System;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading;
usin
You need to add a reference to the NUNIT dll
It seems like you have references missing. From official Selenium docs page:
Add references to the following DLLs: nmock.dll, nunit.core.dll, nunit. framework.dll, ThoughtWorks.Selenium.Core.dll, ThoughtWorks.Selenium.IntegrationTests.dll and ThoughtWorks.Selenium.UnitTests.dll
For your current problem, you need to reference at least NUnit.Framework.dll and Selenium dlls.
Please read the docs page for more info.
Right click on references in the solution explorer and click add reference. You will need to browse for the nunit.framework.dll