add file-based app info for dotnet-restore

Author: meaghanlewis

docs/core/tools/dotnet-restore.md

@@ -1,11 +1,11 @@
 ---
 title: dotnet restore command
 description: Learn how to restore dependencies and project-specific tools with the dotnet restore command.
-ms.date: 07/19/2023
+ms.date: 09/24/2025
 ---
 # dotnet restore
 
-**This article applies to:** ✔️ .NET Core 3.1 SDK and later versions
+**This article applies to:** ✔️ .NET 6 and later versions
 
 ## Name
 
@@ -14,7 +14,7 @@ ms.date: 07/19/2023
 ## Synopsis
 
 ```dotnetcli
-dotnet restore [<ROOT>] [--configfile <FILE>] [--disable-build-servers]
+dotnet restore [<PROJECT>|<SOLUTION>|<FILE>] [--configfile <FILE>] [--disable-build-servers]
     [--disable-parallel]
     [-f|--force] [--force-evaluate] [--ignore-failed-sources]
     [--interactive] [--lock-file-path <LOCK_FILE_PATH>] [--locked-mode]
@@ -86,9 +86,15 @@ There are three specific settings that `dotnet restore` ignores:
 
 ## Arguments
 
-- **`ROOT`**
+`PROJECT | SOLUTION | FILE`
 
-  Optional path to the project file to restore.
+  The project or solution or C# (file-based program) file to restore. If a file isn't specified, MSBuild searches the current directory for a project or solution.
+
+  * `PROJECT` is the path and filename of a C#, F#, or Visual Basic project file, or the path to a directory that contains a C#, F#, or Visual Basic project file. If the directory is not specified, it defaults to the current directory.
+
+  * `SOLUTION` is the path and filename of a solution file (*.sln* or *.slnx* extension), or the path to a directory that contains a solution file. If the directory is not specified, it defaults to the current directory.
+
+  * `FILE` is the path and filename of a file-based app. Files-based apps are programs contained within a single `*.cs` file that are built and run without a corresponding project (`*.csproj`) file. For more information, see [Build file-based C# programs](/dotnet/csharp/fundamentals/tutorials/file-based-programs).
 
 ## Options