Update unit-testing-visual-csharp-code-in-a-store-app.md

docs/test/unit-testing-visual-csharp-code-in-a-store-app.md

@@ -89,14 +89,17 @@ This article also creates a single Visual Studio solution and separate projects
 3. Add the following code to the Rooter class *Rooter.cs* file:
 
    ```csharp
-   public Rooter()
+   public class Rooter
    {
-   }
+       public Rooter()
+       {
+       }
 
-   // estimate the square root of a number
-   public double SquareRoot(double x)
-   {
-       return 0.0;
+       // estimate the square root of a number
+       public double SquareRoot(double x)
+       {
+           return 0.0;
+       }
    }
    ```
 
@@ -318,4 +321,4 @@ Note that the `RangeTest` method hard codes the denominator of the `tolerance` v
 2. Choose **Run All** to test the refactored method and make sure that you haven't introduced an error.
 
 > [!NOTE]
-> If you add a helper method to a test class that you don't want to appear in **Test Explorer**, do not add the <xref:Microsoft.VisualStudio.TestTools.UnitTesting.TestMethodAttribute> attribute to the method.
+> If you add a helper method to a test class that you don't want to appear in **Test Explorer**, do not add the <xref:Microsoft.VisualStudio.TestTools.UnitTesting.TestMethodAttribute> attribute to the method.