Unify sequence step delimiter with guide (#1521)

* Unify sequence step delimiter with guide

* Unify sequence step delimiter with guide

* Fix list number duplicate

Author: patridge

winforms/formatting-utility/cs/readme.md

@@ -30,11 +30,11 @@ The source code includes an MSBuild project file for C# (a .csproj file) that ta
 
 4. If you are using Visual Studio 2019:
 
-   1. In Visual Studio, select **Open a project or solution** (or **File** -> **Open** --> **Project/Solution** from the Visual Studio menu.
+   1. In Visual Studio, select **Open a project or solution** (or **File** > **Open** > **Project/Solution** from the Visual Studio menu.
 
-   2. Select **Debug** --> **Start Debugging** from the Visual Studio menu to build and launch the application.
+   2. Select **Debug** > **Start Debugging** from the Visual Studio menu to build and launch the application.
 
-4. If you are working from the command line:
+5. If you are working from the command line:
 
    1. Navigate to the directory that contains the sample.
 

winforms/formatting-utility/vb/readme.md

@@ -29,17 +29,16 @@ The source code includes an MSBuild project file for Visual Basic (a .vbproj fil
 
 4. If you are using Visual Studio 2019:
 
-   1. In Visual Studio, select **Open a project or solution** (or **File** -> **Open** --> **Project/Solution** from the Visual Studio menu.
+   1. In Visual Studio, select **Open a project or solution** (or **File** > **Open** > **Project/Solution** from the Visual Studio menu.
 
-   2. Select **Debug** --> **Start Debugging** from the Visual Studio menu to build and launch the application.
+   2. Select **Debug** > **Start Debugging** from the Visual Studio menu to build and launch the application.
 
-4. If you are working from the command line:
+5. If you are working from the command line:
 
    1. Navigate to the directory that contains the sample.
 
    2. Type in the command `dotnet run` to build and launch the application.
 
-
 ## Format strings in .NET
 
 *Formatting* involves converting a value to its string representation. `ToString` methods that include a string parameter, [interpolated strings](https://docs.microsoft.com/dotnet/csharp/language-reference/tokens/interpolated), as well as the [composite formatting feature](https://docs.microsoft.com/dotnet/standard/base-types/composite-formatting) supported by such methods as [String.Format](https://docs.microsoft.com/dotnet/api/system.string.format), [StringBuilder.AppendFormat](https://docs.microsoft.com/dotnet/api/system.text.stringbuilder.appendformat), the [Console](https://docs.microsoft.com/dotnet/api/system.console) output methods, and the stream output methods give developers control over the string representations of numbers and dates. They allow such code as: