[fix-finder] Remove unused using directives in Aapt2.cs

[github-actions]

Problem

src/Xamarin.Android.Build.Tasks/Tasks/Aapt2.cs declares 16 using directives, several of which are never referenced anywhere in the file. Removing them reduces clutter and avoids misleading readers about the file's dependencies.

Location

• File(s): src/Xamarin.Android.Build.Tasks/Tasks/Aapt2.cs
• Line(s): 4-19 (the using block)

Current Code

using System;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Threading;
using System.Xml;
using System.Xml.Linq;
using System.Text;
using Microsoft.Build.Utilities;
using Microsoft.Build.Framework;
using System.Text.RegularExpressions;
using System.Collections.Generic;
using System.Collections.Concurrent;
using Xamarin.Android.Tools;
using ThreadingTasks = System.Threading.Tasks;
using Microsoft.Android.Build.Tasks;

Suggested Fix

Remove the following directives, which are confirmed unused (no type, method, extension method, or alias from them is referenced in the file):

• using System.Diagnostics; — only appears in a code comment, no type usage
• using System.Linq; — no LINQ extension methods used
• using System.Xml; — no System.Xml types used
• using System.Xml.Linq; — no X* types used
• using System.Text.RegularExpressions; — the Regex.Match call is on AndroidRunToolTask.AndroidErrorRegex; the result is stored in a var, so no RegularExpressions type is named
• using ThreadingTasks = System.Threading.Tasks; — the alias is never referenced

Keep all other directives (System, System.IO, System.Threading, System.Text, Microsoft.Build.*, System.Collections.Generic, System.Collections.Concurrent, Xamarin.Android.Tools, Microsoft.Android.Build.Tasks), which are all in use.

Resulting block:

using System;
using System.IO;
using System.Threading;
using System.Text;
using Microsoft.Build.Utilities;
using Microsoft.Build.Framework;
using System.Collections.Generic;
using System.Collections.Concurrent;
using Xamarin.Android.Tools;
using Microsoft.Android.Build.Tasks;

Guidelines

• Follow dotnet/android formatting conventions (tabs, Mono style)
• Do not reorder the remaining directives
• Verify the project still builds after removal

Acceptance Criteria

• The six unused directives listed above are removed
• Xamarin.Android.Build.Tasks compiles cleanly
• All tests pass
• No new warnings introduced

Fix-finder metadata

• Script: 06-unused-using-directives
• Score: 28/30 (actionability: 10, safety: 8, scope: 10)

Generated by Nightly Fix Finder · 73.4 AIC · ⌖ 17.5 AIC · ⊞ 9.3K · ◷

• expires on Jul 19, 2026, 2:27 AM UTC