diff --git a/CodeLineCounter.Tests/DependencyGraphGeneratorTests.cs b/CodeLineCounter.Tests/DependencyGraphGeneratorTests.cs
index b99eb3c..b097174 100644
--- a/CodeLineCounter.Tests/DependencyGraphGeneratorTests.cs
+++ b/CodeLineCounter.Tests/DependencyGraphGeneratorTests.cs
@@ -85,6 +85,31 @@ public async Task generate_graph_with_empty_dependencies_creates_empty_graph()
 
         }
 
+        [Fact]
+        public async Task CompileGraphAndWriteToFile_HandlesInvalidOutputPathGracefully()
+        {
+            // Arrange
+                var dependencies = new List<DependencyRelation>
+        {
+            new DependencyRelation { SourceClass = "ClassA", SourceNamespace = "NamespaceA",
+                SourceAssembly = "AssemblyA", TargetClass = "ClassB", TargetNamespace = "NamespaceB",
+                TargetAssembly = "AssemblyB", FilePath = "path/to/file", StartLine = 1 }
+        };
+            DotGraph graph = DependencyGraphGenerator.GenerateGraphOnly(dependencies);
+
+            // Invalid path with characters that aren't allowed in file paths
+            string invalidOutputPath = Path.Combine(_testDirectory, "invalid_path*?:|<>\\");
+            string fileName = "test.dot";
+
+            // Act & Assert
+            // The method should handle the exception internally and not throw it to the caller
+            await DependencyGraphGenerator.CompileGraphAndWriteToFile(fileName, invalidOutputPath, graph);
+
+            // Verify the file wasn't created due to the invalid path
+            Assert.False(File.Exists(Path.Combine(invalidOutputPath, fileName)));
+        }
+
+
         [Fact]
         public void create_node_sets_correct_fillcolor_and_style_incoming_greater()
         {
diff --git a/CodeLineCounter.Tests/FileUtilsTests.cs b/CodeLineCounter.Tests/FileUtilsTests.cs
index c21e091..470eabe 100644
--- a/CodeLineCounter.Tests/FileUtilsTests.cs
+++ b/CodeLineCounter.Tests/FileUtilsTests.cs
@@ -48,7 +48,7 @@ public void get_solution_files_throws_exception_for_nonexistent_directory()
             var nonExistentPath = Path.Combine(_testDirectory, Guid.NewGuid().ToString());
 
             // Act & Assert
-            Assert.Throws<UnauthorizedAccessException>(() => FileUtils.GetSolutionFiles(nonExistentPath));
+            Assert.Throws<DirectoryNotFoundException>(() => FileUtils.GetSolutionFiles(nonExistentPath));
         }
 
         // Throws UnauthorizedAccessException when solution file does not exist
@@ -59,7 +59,7 @@ public void get_project_files_throws_when_file_not_exists()
             var nonExistentPath = Path.Combine(_testDirectory, "nonexistent.sln");
 
             // Act & Assert
-            var exception = Assert.Throws<UnauthorizedAccessException>(() =>
+            var exception = Assert.Throws<FileNotFoundException>(() =>
                 FileUtils.GetProjectFiles(nonExistentPath));
 
             Assert.Contains(nonExistentPath, exception.Message);
@@ -67,21 +67,15 @@ public void get_project_files_throws_when_file_not_exists()
 
         protected override void Dispose(bool disposing)
         {
-
             // Ensure the file is closed before attempting to delete it
-            if (disposing)
+            if (disposing && Directory.Exists(_testDirectory))
             {
-                if (Directory.Exists(_testDirectory))
-                {
-                    // Dispose managed resources
-                    Directory.Delete(_testDirectory, true);
-                }
+                // Dispose managed resources
+                Directory.Delete(_testDirectory, true);
             }
 
             // Dispose unmanaged resources (if any)
             base.Dispose(disposing);
-
         }
-
     }
-}
\ No newline at end of file
+}
diff --git a/CodeLineCounter.Tests/JsonHandlerTests.cs b/CodeLineCounter.Tests/JsonHandlerTests.cs
index 612e93b..68f6d68 100644
--- a/CodeLineCounter.Tests/JsonHandlerTests.cs
+++ b/CodeLineCounter.Tests/JsonHandlerTests.cs
@@ -47,18 +47,14 @@ public void deserialize_valid_json_file_returns_expected_objects()
 
         protected override void Dispose(bool disposing)
         {
-            if (disposing)
+            if (disposing && Directory.Exists(_testDirectory))
             {
-                if (Directory.Exists(_testDirectory))
-                {
-                    // Dispose managed resources
-                    Directory.Delete(_testDirectory, true);
-                }
+                // Dispose managed resources
+                Directory.Delete(_testDirectory, true);
             }
 
             // Dispose unmanaged resources (if any)
             base.Dispose(disposing);
-
         }
 
 
diff --git a/CodeLineCounter.Tests/SolutionAnalyzerTests.cs b/CodeLineCounter.Tests/SolutionAnalyzerTests.cs
index 7d327e3..b59c2d2 100644
--- a/CodeLineCounter.Tests/SolutionAnalyzerTests.cs
+++ b/CodeLineCounter.Tests/SolutionAnalyzerTests.cs
@@ -41,8 +41,6 @@ public void analyze_and_export_solution_succeeds_with_valid_inputs()
             var format = CoreUtils.ExportFormat.CSV;
             var outputPath = _outputPath;
 
-
-
             try
             {
 
@@ -80,10 +78,10 @@ public void analyze_and_export_solution_throws_on_invalid_path()
             var format = CoreUtils.ExportFormat.JSON;
 
             // Act & Assert
-            var exception = Assert.Throws<UnauthorizedAccessException>(() =>
+            var exception = Assert.Throws<FileNotFoundException>(() =>
             SolutionAnalyzer.AnalyzeAndExportSolution(invalidPath, verbose, format));
 
-            Assert.Contains("Access to the path '' is denied.", exception.Message);
+            Assert.Contains("File '' not found.", exception.Message);
 
         }
 
@@ -147,8 +145,7 @@ public void OutputDetailedMetrics_ShouldPrintMetricsAndProjectTotals()
             // Arrange
             var metrics = new List<NamespaceMetrics>
                 {
-                    new NamespaceMetrics
-                    {
+                    new() {
                         ProjectName = "Project1",
                         ProjectPath = "/path/to/project1",
                         NamespaceName = "Namespace1",
@@ -157,7 +154,7 @@ public void OutputDetailedMetrics_ShouldPrintMetricsAndProjectTotals()
                         LineCount = 100,
                         CyclomaticComplexity = 10
                     },
-                    new NamespaceMetrics
+                    new ()
                     {
                         ProjectName = "Project2",
                         ProjectPath = "/path/to/project2",
@@ -233,14 +230,11 @@ public void export_results_with_valid_input_exports_all_files()
         protected override void Dispose(bool disposing)
         {
 
-            if (disposing)
+            if (disposing && Directory.Exists(_testDirectory))
             {
-                if (Directory.Exists(_testDirectory))
-                {
-                    // Dispose managed resources
-                    File.Delete(_testSolutionPath);
-                    Directory.Delete(_testDirectory, true);
-                }
+                // Dispose managed resources
+                File.Delete(_testSolutionPath);
+                Directory.Delete(_testDirectory, true);
             }
 
             // Dispose unmanaged resources (if any)
diff --git a/CodeLineCounter/Services/DependencyGraphGenerator.cs b/CodeLineCounter/Services/DependencyGraphGenerator.cs
index df2685c..4596b52 100644
--- a/CodeLineCounter/Services/DependencyGraphGenerator.cs
+++ b/CodeLineCounter/Services/DependencyGraphGenerator.cs
@@ -163,21 +163,36 @@ public static DotNode CreateNode(Dictionary<string, (int incoming, int outgoing)
 
         public static async Task CompileGraphAndWriteToFile(string fileName, string outputPath, DotGraph graph)
         {
-            // Use memory buffer
-            using var memoryStream = MemoryStreamManager.GetStream();
-            using var writer = new StreamWriter(memoryStream);
 
-            var options = new CompilationOptions { Indented = true };
-            var context = new CompilationContext(writer, options);
-            graph.Directed = true;
-            context.DirectedGraph = true;
+                // Use memory buffer
+                using var memoryStream = MemoryStreamManager.GetStream();
+                using var writer = new StreamWriter(memoryStream);
+
+                var options = new CompilationOptions { Indented = true };
+                var context = new CompilationContext(writer, options);
+                graph.Directed = true;
+                context.DirectedGraph = true;
+
+                await graph.CompileAsync(context);
+                await writer.FlushAsync(); // Ensure all data is written to memory
 
-            await graph.CompileAsync(context);
-            await writer.FlushAsync(); // Ensure all data is written to memory
+                memoryStream.Position = 0; // Reset position to start
+                await WriteMemoryStreamToFile(fileName, outputPath, memoryStream);
+
+        }
 
-            memoryStream.Position = 0; // Reset position to start
-            using var fileStream = File.Create(Path.Combine(outputPath, fileName));
-            await memoryStream.CopyToAsync(fileStream); // Write complete buffer to file
+        private static async Task WriteMemoryStreamToFile(string fileName, string outputPath, RecyclableMemoryStream memoryStream)
+        {
+            try
+            {
+                using var fileStream = File.Create(Path.Combine(outputPath, fileName));
+                await memoryStream.CopyToAsync(fileStream); // Write complete buffer to file
+            }
+            catch (Exception ex)
+            {
+                // Log or handle the exception as needed
+                await Console.Error.WriteLineAsync($"Error writing memory stream to file: {ex.Message}");
+            }
         }
 
         public static string EncloseNotEmptyOrNullStringInQuotes(string? str)
diff --git a/CodeLineCounter/Utils/FileUtils.cs b/CodeLineCounter/Utils/FileUtils.cs
index f34a95b..0b2957c 100644
--- a/CodeLineCounter/Utils/FileUtils.cs
+++ b/CodeLineCounter/Utils/FileUtils.cs
@@ -4,28 +4,37 @@ namespace CodeLineCounter.Utils
 {
     public static partial class FileUtils
     {
-        public static List<string> GetAllCsFiles(string rootPath)
+        // Default file extensions
+        private const string DEFAULT_CODE_EXTENSION = "*.cs";
+        private const string DEFAULT_SOLUTION_EXTENSION = "*.sln";
+        private const string DEFAULT_PROJECT_EXTENSION = ".csproj";
+
+        public static List<string> GetAllCodeFiles(string rootPath, string fileExtension = DEFAULT_CODE_EXTENSION)
         {
-            return Directory.GetFiles(rootPath, "*.cs", SearchOption.AllDirectories)
-                            .Where(f => !f.Contains(@"\obj\"))
-                            .ToList();
+            var excludeFolders = new[] { @"\obj\", @"\bin\", @"\.*" };
+            return Directory.GetFiles(rootPath, fileExtension, SearchOption.AllDirectories)
+                           .Where(f => !excludeFolders.Any(ef => f.Contains(ef)))
+                           .ToList();
         }
 
-        public static List<string> GetSolutionFiles(string rootPath)
+        // For backward compatibility
+        public static List<string> GetAllCsFiles(string rootPath) => GetAllCodeFiles(rootPath);
+
+        public static List<string> GetSolutionFiles(string rootPath, string fileExtension = DEFAULT_SOLUTION_EXTENSION)
         {
             if (!Directory.Exists(rootPath))
             {
-                throw new UnauthorizedAccessException($"Access to the path '{rootPath}' is denied.");
+                throw new DirectoryNotFoundException($"Directory '{rootPath}' not found.");
             }
 
-            return Directory.GetFiles(rootPath, "*.sln", SearchOption.TopDirectoryOnly).ToList();
+            return Directory.GetFiles(rootPath, fileExtension, SearchOption.TopDirectoryOnly).ToList();
         }
 
-        public static List<string> GetProjectFiles(string solutionFilePath)
+        public static List<string> GetProjectFiles(string solutionFilePath, string projectExtension = DEFAULT_PROJECT_EXTENSION)
         {
             if (!File.Exists(solutionFilePath))
             {
-                throw new UnauthorizedAccessException($"Access to the path '{solutionFilePath}' is denied.");
+                throw new FileNotFoundException($"File '{solutionFilePath}' not found.");
             }
 
             var projectFiles = new List<string>();
@@ -33,8 +42,8 @@ public static List<string> GetProjectFiles(string solutionFilePath)
 
             foreach (var line in lines)
             {
-                // Search for lines containing projects (Project("...") = "...", "...", "...")
-                var match = MyRegex().Match(line);
+                // Search for lines containing projects with the specified extension
+                var match = GenerateProjectRegex(projectExtension).Match(line);
                 if (match.Success)
                 {
                     var relativePath = match.Groups[1].Value;
@@ -48,11 +57,15 @@ public static List<string> GetProjectFiles(string solutionFilePath)
 
         public static string GetBasePath()
         {
-            // Arrange
             return Path.GetDirectoryName(AppContext.BaseDirectory) ?? string.Empty;
         }
 
+        private static Regex GenerateProjectRegex(string projectExtension)
+        {
+            return new Regex($@"Project\(""{{.*}}""\) = "".*"", ""(.*{Regex.Escape(projectExtension)})""", RegexOptions.IgnoreCase, TimeSpan.FromMilliseconds(100));
+        }
+
         [GeneratedRegex(@"Project\(""{.*}""\) = "".*"", ""(.*\.csproj)""")]
         private static partial Regex MyRegex();
     }
-}
+}
\ No newline at end of file