Refactor FileSystemContext

Author: inyutin-maxim

System.IO.Abstractions.Analyzers/Analyzers/BaseFileSystemAnalyzer.cs

@@ -20,7 +20,7 @@ public override void Initialize(AnalysisContext context)
 		{
 			var fileSystemContext = new FileSystemContext(compilationStartContext.Compilation);
 
-			if (ShouldAnalyze(fileSystemContext))
+			if (fileSystemContext.HasReference)
 			{
 				AnalyzeCompilation(compilationStartContext, fileSystemContext);
 			}
@@ -34,6 +34,4 @@ public override void Initialize(AnalysisContext context)
 	/// <param name="fileSystemContext"> FileSystem Context </param>
 	protected abstract void AnalyzeCompilation(CompilationStartAnalysisContext compilationStartContext,
 												FileSystemContext fileSystemContext);
-
-	private static bool ShouldAnalyze(FileSystemContext fileSystemContext) => fileSystemContext.HasReference;
 }

System.IO.Abstractions.Analyzers/FileSystemContext.cs

@@ -6,7 +6,7 @@ public class FileSystemContext
 {
 	public FileSystemContext(Compilation compilation) => FileSystemType = compilation.GetTypeByMetadataName(Constants.FileSystem);
 
-	public bool HasReference => FileSystemType != null;
+	public bool HasReference => FileSystemType is not null;
 
-	public INamedTypeSymbol FileSystemType { get; }
+	private INamedTypeSymbol FileSystemType { get; }
 }