Visual Studio Macro to convert Exported Selenium C# from NUnit to MSTest per http://www.stormbase.net/converting-from-nunit-to-mstest

SeleniumCSharpNUnitToMSTest.vb

Imports System
Imports EnvDTE
Imports EnvDTE80
Imports EnvDTE90
Imports EnvDTE90a
Imports EnvDTE100
Imports System.Diagnostics

Public Module SeleniumConvertNUnitToMSTest
    Private Sub FindReplaceHelper(ByVal text As String)
        DTE.Find.FindWhat = text
        DTE.Find.Target = vsFindTarget.vsFindTargetCurrentDocument
        DTE.Find.MatchCase = True
        DTE.Find.MatchWholeWord = True
        DTE.Find.MatchInHiddenText = False
        DTE.Find.PatternSyntax = vsFindPatternSyntax.vsFindPatternSyntaxLiteral
        DTE.Find.Execute()
    End Sub
    Private Sub Replace(ByVal text As String, ByVal replace As String)
        DTE.ExecuteCommand("Edit.Replace")
        DTE.Find.Action = vsFindAction.vsFindActionReplaceAll
        DTE.Find.ReplaceWith = replace
        DTE.Find.ResultsLocation = vsFindResultsLocation.vsFindResultsNone
        FindReplaceHelper(Text)
    End Sub

    Private Sub Find(ByVal text As String)
        DTE.ExecuteCommand("Edit.Find")
        DTE.Find.Action = vsFindAction.vsFindActionFind
        DTE.Find.Backwards = False
        FindReplaceHelper(text)
    End Sub

    Sub SeleniumConvertNUnitToMSTest()
        
        Replace("using NUnit.Framework;", "using Microsoft.VisualStudio.TestTools.UnitTesting;")
        'DTE.ActiveDocument.Selection.StartOfLine(vsStartOfLineOptions.vsStartOfLineOptionsFirstText)
        'DTE.ActiveDocument.Selection.Text = "//"
        Replace("[TestFixture]", "[TestClass]")
        Replace("[Test]", "[TestMethod]")
        Replace("[SetUp]", "[TestInitialize]")
        Replace("[TearDown]", "[TestCleanup]")
        Replace("[TestFixtureSetUp]", "[ClassInitialize]")
        Replace("[TestFixtureTearDown]", "[ClassCleanup]")
        Replace("AssertionException", "AssertFailedException")
        Replace("public class ", "public sealed class ")

        'Prevent Code analysis build errors
        Find("public sealed class ")
        DTE.ExecuteCommand("Edit.Replace")
        DTE.ActiveWindow.Close()

        DTE.ActiveDocument.Selection.EndOfLine()
        DTE.ActiveDocument.Selection.Text = " : IDisposable"
        DTE.ActiveDocument.Selection.EndOfDocument()
        DTE.ActiveDocument.Selection.LineUp(False, 3)
        DTE.ActiveDocument.Selection.EndOfLine()
        DTE.ActiveDocument.Selection.NewLine()
        DTE.ActiveDocument.Selection.Text = "public void Dispose() { driver.Dispose(); }"

        DTE.ActiveDocument.Save()
    End Sub

End Module

another solution for this need:
http://files.dotblogs.com.tw/hatelove/1311/20131126132839723.zip

introduction: http://www.dotblogs.com.tw/hatelove/archive/2013/11/26/selenium-ide-export-to-csharp-webdriver-mstest.aspx