Detect Static Dependencies

Workflow

Step 1: Determine scan scope

Resolve the target to a set of .cs files:

• If a .cs file, scan that single file.
• If a directory, scan all .cs files recursively (excluding obj/, bin/).
• If a .csproj, find its directory and scan .cs files within.
• If a .sln, parse it, find all project directories, and scan .cs files across all projects.

Always exclude obj/, bin/, and any user-specified exclusion patterns.

Step 2: Search for static dependency patterns

Scan each file for calls matching these categories:

| Category | Patterns to search for | Recommended replacement | |----------|----------------------|------------------------| | Time | DateTime.Now, DateTime.UtcNow, DateTime.Today, DateTimeOffset.Now, DateTimeOffset.UtcNow, Task.Delay(, new CancellationTokenSource(TimeSpan | TimeProvider (.NET 8+) | | File System | File.ReadAllText(, File.WriteAllText(, File.Exists(, File.Delete(, File.Copy(, File.Move(, Directory.Exists(, Directory.CreateDirectory(, Directory.GetFiles(, Directory.Delete(, Path.Combine(, Path.GetTempPath( | IFileSystem (System.IO.Abstractions NuGet) | | Environment | Environment.GetEnvironmentVariable(, Environment.SetEnvironmentVariable(, Environment.MachineName, Environment.UserName, Environment.CurrentDirectory, Environment.Exit( | Custom IEnvironmentProvider | | Network | new HttpClient(, HttpClient.GetAsync(, HttpClient.PostAsync(, HttpClient.SendAsync( | IHttpClientFactory (built-in) | | Console | Console.WriteLine(, Console.ReadLine(, Console.Write(, Console.ReadKey( | IConsole wrapper or ILogger | | Process | Process.Start(, Process.GetCurrentProcess(, Process.GetProcessesByName( | Custom IProcessRunner |

Step 3: Aggregate and rank results

Count each static call pattern across the entire scan scope. Produce a summary with:

1. Category summary — total call sites per category (time, filesystem, env, etc.)
2. Top patterns — the 10 most frequent individual patterns ranked by count
3. Most affected files — files with the highest number of static dependencies
4. Existing abstractions available — for each category, note the recommended .NET abstraction:

- Time → TimeProvider (built-in since .NET 8) - File system → System.IO.Abstractions (NuGet package) - HTTP → IHttpClientFactory (built-in) - Environment → custom IEnvironmentProvider - Console → custom IConsole or ILogger - Process → custom IProcessRunner

Step 4: Present the report

Format the output as a structured report:

Related skills