Raise AnalysisLevel to 6.0-Recommended, fix warnings (#2086)

Raise the .NET Code Analysis Level to `6.0-Minimum` and then `6.0-Recommended`.

src/ApiService/.editorconfig

@@ -139,3 +139,26 @@ csharp_preserve_single_line_blocks = true
 
 [*.{cs}]
 dotnet_diagnostic.IDE0005.severity = warning
+
+# allow use of FirstOrDefault/LastOrDefault: https://github.com/dotnet/roslyn-analyzers/issues/1817 & https://github.com/dotnet/roslyn-analyzers/pull/4211#issuecomment-1003578755
+dotnet_code_quality.CA1826.exclude_ordefault_methods = true
+
+# permit underscores in identifier names (e.g. tests, constants)
+dotnet_diagnostic.CA1707.severity = none
+
+# don't care about names that conflict with keywords in other languages
+dotnet_diagnostic.CA1716.severity = none
+
+# don't care about names that contain built-in identifiers
+dotnet_diagnostic.CA1711.severity = none
+dotnet_diagnostic.CA1720.severity = none
+
+# allow static fields on generic types
+dotnet_diagnostic.CA1000.severity = none
+
+# don't worry about performance of ILogger invocations (yet?)
+dotnet_diagnostic.CA1848.severity = none
+
+# allow throwing base "Exception" class, since it's done a lot
+# TODO: improve this
+dotnet_diagnostic.CA2201.severity = suggestion

src/ApiService/ApiService/Log.cs

@@ -59,7 +59,7 @@ class AppInsights : ILog {
 //TODO: Should we write errors and Exception to std err ? 
 class Console : ILog {
 
-    private string DictToString<T>(IReadOnlyDictionary<string, T>? d) {
+    private static string DictToString<T>(IReadOnlyDictionary<string, T>? d) {
         if (d is null) {
             return string.Empty;
         } else {
@@ -67,14 +67,14 @@ class Console : ILog {
         }
     }
 
-    private void LogTags(Guid correlationId, IReadOnlyDictionary<string, string> tags) {
+    private static void LogTags(Guid correlationId, IReadOnlyDictionary<string, string> tags) {
         var ts = DictToString(tags);
         if (!string.IsNullOrEmpty(ts)) {
             System.Console.WriteLine($"[{correlationId}] Tags:{ts}");
         }
     }
 
-    private void LogMetrics(Guid correlationId, IReadOnlyDictionary<string, double>? metrics) {
+    private static void LogMetrics(Guid correlationId, IReadOnlyDictionary<string, double>? metrics) {
         var ms = DictToString(metrics);
         if (!string.IsNullOrEmpty(ms)) {
             System.Console.Out.WriteLine($"[{correlationId}] Metrics:{DictToString(metrics)}");
@@ -126,7 +126,7 @@ internal interface ILogTracerInternal : ILogTracer {
 
 
 public class LogTracer : ILogTracerInternal {
-    private string? GetCaller() {
+    private static string? GetCaller() {
         return new StackTrace()?.GetFrame(2)?.GetMethod()?.DeclaringType?.FullName;
     }
 

src/ApiService/ApiService/OneFuzzTypes/Enums.cs

@@ -8,7 +8,7 @@ public enum ErrorCode {
     INVALID_PERMISSION = 451,
     MISSING_EULA_AGREEMENT = 452,
     INVALID_JOB = 453,
-    INVALID_TASK = 453,
+    INVALID_TASK = INVALID_JOB,
     UNABLE_TO_ADD_TASK_TO_JOB = 454,
     INVALID_CONTAINER = 455,
     UNABLE_TO_RESIZE = 456,

src/ApiService/ApiService/OneFuzzTypes/Model.cs

@@ -333,7 +333,7 @@ public record InstanceConfig
         "Standard_B2s") { }
     public InstanceConfig() : this(String.Empty) { }
 
-    public List<Guid>? CheckAdmins(List<Guid>? value) {
+    public static List<Guid>? CheckAdmins(List<Guid>? value) {
         if (value is not null && value.Count == 0) {
             throw new ArgumentException("admins must be null or contain at least one UUID");
         } else {

src/ApiService/ApiService/QueueTaskHeartbeat.cs

@@ -20,14 +20,14 @@ public class QueueTaskHearbeat {
 
     [Function("QueueTaskHeartbeat")]
     public async Async.Task Run([QueueTrigger("task-heartbeat", Connection = "AzureWebJobsStorage")] string msg) {
-        _logger.LogInformation($"heartbeat: {msg}");
+        _logger.LogInformation("heartbeat: {Message}", msg);
 
         var hb = JsonSerializer.Deserialize<TaskHeartbeatEntry>(msg, EntityConverter.GetJsonSerializerOptions()).EnsureNotNull($"wrong data {msg}");
 
         var task = await _tasks.GetByTaskId(hb.TaskId);
 
         if (task == null) {
-            _logger.LogWarning($"invalid task id: {hb.TaskId}");
+            _logger.LogWarning("invalid task id: {TaskId}", hb.TaskId);
             return;
         }
 

src/ApiService/ApiService/TimerDaily.cs

@@ -21,7 +21,7 @@ public class TimerDaily {
     public async Async.Task Run([TimerTrigger("1.00:00:00")] TimerInfo myTimer) {
         var scalesets = _scalesets.Search();
         await foreach (var scaleset in scalesets) {
-            _logger.LogInformation($"updating scaleset configs: {scaleset.ScalesetId}");
+            _logger.LogInformation("updating scaleset configs: {ScaleSetId}", scaleset.ScalesetId);
             // todo: do it in batches
             await _scalesets.Replace(scaleset with { NeedsConfigUpdate = true });
         }
@@ -29,7 +29,7 @@ public class TimerDaily {
 
         var expiredWebhookLogs = _webhookMessageLogs.SearchExpired();
         await foreach (var logEntry in expiredWebhookLogs) {
-            _logger.LogInformation($"stopping expired webhook message log: {logEntry.WebhookId}:{logEntry.EventId}");
+            _logger.LogInformation("stopping expired webhook message log: {WebhookId}:{EventId}", logEntry.WebhookId, logEntry.EventId);
             await _webhookMessageLogs.Delete(logEntry);
         }
     }

src/ApiService/ApiService/onefuzzlib/Config.cs

@@ -21,7 +21,7 @@ public class Config : IConfig {
         _queue = queue;
     }
 
-    private BlobContainerSasPermissions ConvertPermissions(ContainerPermission permission) {
+    private static BlobContainerSasPermissions ConvertPermissions(ContainerPermission permission) {
         BlobContainerSasPermissions blobPermissions = 0;
         if (permission.HasFlag(ContainerPermission.Read)) {
             blobPermissions |= BlobContainerSasPermissions.Read;

src/ApiService/ApiService/onefuzzlib/Containers.cs

@@ -14,7 +14,7 @@ public interface IContainers {
     public Async.Task<BlobContainerClient?> FindContainer(Container container, StorageType storageType);
 
     public Async.Task<Uri> GetFileSasUrl(Container container, string name, StorageType storageType, BlobSasPermissions permissions, TimeSpan? duration = null);
-    public Async.Task SaveBlob(Container container, string v1, string v2, StorageType config);
+    public Async.Task SaveBlob(Container container, string name, string data, StorageType storageType);
     public Async.Task<Guid> GetInstanceId();
 
     public Async.Task<Uri?> GetFileUrl(Container container, string name, StorageType storageType);
@@ -125,7 +125,7 @@ public class Containers : IContainers {
         return sasUrl;
     }
 
-    public (DateTimeOffset, DateTimeOffset) SasTimeWindow(TimeSpan timeSpan) {
+    public static (DateTimeOffset, DateTimeOffset) SasTimeWindow(TimeSpan timeSpan) {
         // SAS URLs are valid 6 hours earlier, primarily to work around dev
         // workstations having out-of-sync time.  Additionally, SAS URLs are stopped
         // 15 minutes later than requested based on "Be careful with SAS start time"
@@ -149,7 +149,7 @@ public class Containers : IContainers {
     public Async.Task<Guid> GetInstanceId() => _getInstanceId.Value;
     private readonly Lazy<Async.Task<Guid>> _getInstanceId;
 
-    public Uri? GetContainerSasUrlService(
+    public static Uri? GetContainerSasUrlService(
         BlobContainerClient client,
         BlobSasPermissions permissions,
         bool tag = false,

src/ApiService/ApiService/onefuzzlib/Defs.cs

@@ -2,7 +2,7 @@
 
 public static class Defs {
 
-    public static Dictionary<TaskType, TaskDefinition> TASK_DEFINITIONS = new Dictionary<TaskType, TaskDefinition>() {
+    public static readonly IReadOnlyDictionary<TaskType, TaskDefinition> TASK_DEFINITIONS = new Dictionary<TaskType, TaskDefinition>() {
         { TaskType.Coverage ,
             new TaskDefinition(
                 Features: new[] {

src/ApiService/ApiService/onefuzzlib/Events.cs

@@ -35,9 +35,9 @@ namespace Microsoft.OneFuzz.Service {
             _creds = creds;
         }
 
-        public async Async.Task QueueSignalrEvent(EventMessage eventMessage) {
-            var message = new SignalREvent("events", new List<EventMessage>() { eventMessage });
-            await _queue.SendMessage("signalr-events", JsonSerializer.Serialize(message), StorageType.Config);
+        public async Async.Task QueueSignalrEvent(EventMessage message) {
+            var ev = new SignalREvent("events", new List<EventMessage>() { message });
+            await _queue.SendMessage("signalr-events", JsonSerializer.Serialize(ev), StorageType.Config);
         }
 
         public async Async.Task SendEvent(BaseEvent anEvent) {

src/ApiService/ApiService/onefuzzlib/Extension.cs

@@ -71,7 +71,7 @@ public class Extensions : IExtensions {
         return extensions;
     }
 
-    public VirtualMachineScaleSetExtensionData KeyVaultExtension(string region, KeyvaultExtensionConfig keyVault, Os vmOs) {
+    public static VirtualMachineScaleSetExtensionData KeyVaultExtension(string region, KeyvaultExtensionConfig keyVault, Os vmOs) {
         var keyVaultName = keyVault.KeyVaultName;
         var certName = keyVault.CertName;
         var uri = keyVaultName + certName;
@@ -119,7 +119,7 @@ public class Extensions : IExtensions {
         }
     }
 
-    public VirtualMachineScaleSetExtensionData AzSecExtension(string region) {
+    public static VirtualMachineScaleSetExtensionData AzSecExtension(string region) {
         return new VirtualMachineScaleSetExtensionData {
             Name = "AzureSecurityLinuxAgent",
             Publisher = "Microsoft.Azure.Security.Monitoring",
@@ -131,7 +131,7 @@ public class Extensions : IExtensions {
 
     }
 
-    public VirtualMachineScaleSetExtensionData AzMonExtension(string region, AzureMonitorExtensionConfig azureMonitor) {
+    public static VirtualMachineScaleSetExtensionData AzMonExtension(string region, AzureMonitorExtensionConfig azureMonitor) {
         var authId = azureMonitor.MonitoringGCSAuthId;
         var configVersion = azureMonitor.ConfigVersion;
         var moniker = azureMonitor.Moniker;
@@ -164,7 +164,7 @@ public class Extensions : IExtensions {
 
 
 
-    public VirtualMachineScaleSetExtensionData GenevaExtension(string region) {
+    public static VirtualMachineScaleSetExtensionData GenevaExtension(string region) {
         return new VirtualMachineScaleSetExtensionData {
             Name = "Microsoft.Azure.Geneva.GenevaMonitoring",
             Publisher = "Microsoft.Azure.Geneva",
@@ -175,7 +175,7 @@ public class Extensions : IExtensions {
         };
     }
 
-    public VirtualMachineScaleSetExtensionData? DependencyExtension(string region, Os vmOs) {
+    public static VirtualMachineScaleSetExtensionData? DependencyExtension(string region, Os vmOs) {
 
         if (vmOs == Os.Windows) {
             return new VirtualMachineScaleSetExtensionData {

src/ApiService/ApiService/onefuzzlib/NodeOperations.cs

@@ -41,8 +41,8 @@ public interface INodeOperations : IStatefulOrm<Node, NodeState> {
     IAsyncEnumerable<Node> GetDeadNodes(Guid scaleSetId, TimeSpan expirationPeriod);
 
     Async.Task MarkTasksStoppedEarly(Node node, Error? error = null);
-    static TimeSpan NODE_EXPIRATION_TIME = TimeSpan.FromHours(1.0);
-    static TimeSpan NODE_REIMAGE_TIME = TimeSpan.FromDays(6.0);
+    static readonly TimeSpan NODE_EXPIRATION_TIME = TimeSpan.FromHours(1.0);
+    static readonly TimeSpan NODE_REIMAGE_TIME = TimeSpan.FromDays(6.0);
 
     Async.Task StopTask(Guid task_id);
 }

src/ApiService/ApiService/onefuzzlib/PoolOperations.cs

@@ -42,7 +42,6 @@ public class PoolOperations : StatefulOrm<Pool, PoolState, PoolOperations>, IPoo
         return QueryAsync(filter: $"client_id eq '{clientId.ToString()}'");
     }
 
-    private string GetPoolQueue(Pool pool) {
-        return $"pool-{pool.PoolId.ToString("N")}";
-    }
+    private static string GetPoolQueue(Pool pool)
+        => $"pool-{pool.PoolId.ToString("N")}";
 }

src/ApiService/ApiService/onefuzzlib/Reports.cs

@@ -17,7 +17,7 @@ public class Reports : IReports {
 
     public async Async.Task<RegressionReportOrReport?> GetReportOrRegression(Container container, string fileName, bool expectReports = false, params string[] args) {
         var filePath = String.Join("/", new[] { container.ContainerName, fileName });
-        if (!fileName.EndsWith(".json")) {
+        if (!fileName.EndsWith(".json", StringComparison.Ordinal)) {
             if (expectReports) {
                 _log.Error($"get_report invalid extension: {filePath}");
             }

src/ApiService/ApiService/onefuzzlib/ReproOperations.cs

@@ -7,7 +7,7 @@ public interface IReproOperations : IStatefulOrm<Repro, VmState> {
 
     public Async.Task<Repro> Stopping(Repro repro);
 
-    public IAsyncEnumerable<Repro> SearchStates(IEnumerable<VmState>? States);
+    public IAsyncEnumerable<Repro> SearchStates(IEnumerable<VmState>? states);
 }
 
 public class ReproOperations : StatefulOrm<Repro, VmState, ReproOperations>, IReproOperations {

src/ApiService/ApiService/onefuzzlib/VmOperations.cs

@@ -53,7 +53,7 @@ public class VmOperations : IVmOperations {
 
         var disks = await _diskOperations.ListDisks(resourceGroup)
             .ToAsyncEnumerable()
-            .Where(disk => disk.Data.Name.StartsWith(name))
+            .Where(disk => disk.Data.Name.StartsWith(name, StringComparison.Ordinal))
             .AnyAsync();
 
         if (disks) {
@@ -99,7 +99,7 @@ public class VmOperations : IVmOperations {
 
         var disks = _diskOperations.ListDisks(resourceGroup)
             .ToAsyncEnumerable()
-            .Where(disk => disk.Data.Name.StartsWith(name));
+            .Where(disk => disk.Data.Name.StartsWith(name, StringComparison.Ordinal));
 
         if (await disks.AnyAsync()) {
             await foreach (var disk in disks) {

src/ApiService/ApiService/onefuzzlib/orm/CaseConverter.cs

@@ -1,4 +1,6 @@
-namespace Microsoft.OneFuzz.Service.OneFuzzLib.Orm;
+using System.Globalization;
+
+namespace Microsoft.OneFuzz.Service.OneFuzzLib.Orm;
 
 public class CaseConverter {
     /// get the start indices of each word and the lat indice
@@ -37,6 +39,7 @@ public class CaseConverter {
 
     }
     public static string SnakeToPascal(string input) {
-        return string.Join("", input.Split('_', StringSplitOptions.RemoveEmptyEntries).Select(x => $"{Char.ToUpper(x[0])}{x.Substring(1)}"));
+        var ti = CultureInfo.InvariantCulture.TextInfo;
+        return string.Concat(input.Split('_', StringSplitOptions.RemoveEmptyEntries).Select(x => ti.ToTitleCase(x)));
     }
 }

src/ApiService/ApiService/onefuzzlib/orm/CustomConverterFactory.cs

@@ -51,7 +51,7 @@ public sealed class CustomEnumConverter<T> : JsonConverter<T> where T : Enum {
         }
 
         var type = typeof(T);
-        _skipFormat = type.GetCustomAttribute<SkipRename>() != null;
+        _skipFormat = type.GetCustomAttribute<SkipRenameAttribute>() != null;
         if (continueProcessing) {
             Array values = Enum.GetValues(type);
 
@@ -102,7 +102,7 @@ public sealed class CustomEnumConverter<T> : JsonConverter<T> where T : Enum {
         if (!_writeCache.TryGetValue(value, out JsonEncodedText formatted)) {
             if (_writeCache.Count == NameCacheLimit) {
                 Debug.Assert(_readCache.Count == NameCacheLimit);
-                throw new ArgumentOutOfRangeException();
+                throw new InvalidOperationException("Hit cache limit");
             }
 
             formatted = FormatAndAddToCaches(value, options.Encoder, _skipFormat);
@@ -118,7 +118,7 @@ public sealed class CustomEnumConverter<T> : JsonConverter<T> where T : Enum {
         return valueEncoded;
     }
 
-    private ValueTuple<string, JsonEncodedText> FormatEnumValue(string value, JsonNamingPolicy namingPolicy, JavaScriptEncoder? encoder, bool skipFormat = false) {
+    private static ValueTuple<string, JsonEncodedText> FormatEnumValue(string value, JsonNamingPolicy namingPolicy, JavaScriptEncoder? encoder, bool skipFormat = false) {
         string converted;
 
         if (!value.Contains(ValueSeparator)) {
@@ -195,7 +195,7 @@ public sealed class PolymorphicConverter<T> : JsonConverter<T> {
 
     public PolymorphicConverter(TypeDiscrimnatorAttribute typeDiscriminator, string discriminatedField) : base() {
         _discriminatorField = typeDiscriminator.FieldName;
-        _typeProvider = (ITypeProvider)(typeDiscriminator.ConverterType.GetConstructor(new Type[] { })?.Invoke(null) ?? throw new JsonException());
+        _typeProvider = (ITypeProvider)(Activator.CreateInstance(typeDiscriminator.ConverterType) ?? throw new JsonException());
         _discriminatedField = discriminatedField;
         _constructorInfo = typeof(T).GetConstructors().FirstOrDefault() ?? throw new JsonException("No Constructor found");
         _parameters = _constructorInfo.GetParameters()?.ToDictionary(x => x.Name ?? "") ?? throw new JsonException();

src/ApiService/ApiService/onefuzzlib/orm/EntityConverter.cs

@@ -26,9 +26,12 @@ public class SerializeValueAttribute : Attribute { }
 
 /// Indicates that the enum cases should no be renamed
 [AttributeUsage(AttributeTargets.Enum)]
-public class SkipRename : Attribute { }
+public class SkipRenameAttribute : Attribute { }
+[AttributeUsage(AttributeTargets.Parameter)]
 public class RowKeyAttribute : Attribute { }
+[AttributeUsage(AttributeTargets.Parameter)]
 public class PartitionKeyAttribute : Attribute { }
+[AttributeUsage(AttributeTargets.Property)]
 public class TypeDiscrimnatorAttribute : Attribute {
     public string FieldName { get; }
     // the type of a function that takes the value of fieldName as an input and return the type
@@ -66,15 +69,11 @@ public class EntityConverter {
 
     private readonly ConcurrentDictionary<Type, EntityInfo> _cache;
 
-    private readonly ETag _emptyETag = new ETag();
-
     public EntityConverter() {
         _options = GetJsonSerializerOptions();
         _cache = new ConcurrentDictionary<Type, EntityInfo>();
-
     }
 
-
     public static JsonSerializerOptions GetJsonSerializerOptions() {
         var options = new JsonSerializerOptions() {
             PropertyNamingPolicy = new OnefuzzNamingPolicy(),
@@ -102,7 +101,7 @@ public class EntityConverter {
         return ctor;
     }
 
-    private IEnumerable<EntityProperty> GetEntityProperties<T>(ParameterInfo parameterInfo) {
+    private static IEnumerable<EntityProperty> GetEntityProperties<T>(ParameterInfo parameterInfo) {
         var name = parameterInfo.Name.EnsureNotNull($"Invalid paramter {parameterInfo}");
         var parameterType = parameterInfo.ParameterType.EnsureNotNull($"Invalid paramter {parameterInfo}");
         var isRowkey = parameterInfo.GetCustomAttribute(typeof(RowKeyAttribute)) != null;
@@ -112,7 +111,7 @@ public class EntityConverter {
 
         (TypeDiscrimnatorAttribute, ITypeProvider)? discriminator = null;
         if (discriminatorAttribute != null) {
-            var t = (ITypeProvider)(discriminatorAttribute.ConverterType.GetConstructor(new Type[] { })?.Invoke(null) ?? throw new Exception("unable to retrive the type provider"));
+            var t = (ITypeProvider)(Activator.CreateInstance(discriminatorAttribute.ConverterType) ?? throw new Exception("unable to retrive the type provider"));
             discriminator = (discriminatorAttribute, t);
         }
 
@@ -149,13 +148,11 @@ public class EntityConverter {
 
     public TableEntity ToTableEntity<T>(T typedEntity) where T : EntityBase {
         if (typedEntity == null) {
-            throw new NullReferenceException();
-        }
-        var type = typeof(T)!;
-        if (type is null) {
-            throw new NullReferenceException();
+            throw new ArgumentNullException(nameof(typedEntity));
         }
 
+        var type = typeof(T);
+
         var entityInfo = GetEntityInfo<T>();
         Dictionary<string, object?> columnValues = entityInfo.properties.SelectMany(x => x).Select(prop => {
             var value = entityInfo.type.GetProperty(prop.name)?.GetValue(typedEntity);
@@ -270,7 +267,7 @@ public class EntityConverter {
             entityInfo.properties.Select(grouping => GetFieldValue(entityInfo, grouping.Key, entity)).ToArray();
         try {
             var entityRecord = (T)entityInfo.constructor.Invoke(parameters);
-            if (entity.ETag != _emptyETag) {
+            if (entity.ETag != default) {
                 entityRecord.ETag = entity.ETag;
             }
             entityRecord.TimeStamp = entity.Timestamp;

src/ApiService/ApiService/onefuzzlib/orm/Orm.cs

@@ -27,9 +27,11 @@ namespace ApiService.OneFuzzLib.Orm {
 
 
     public class Orm<T> : IOrm<T> where T : EntityBase {
+#pragma warning disable CA1051 // permit visible instance fields
         protected readonly EntityConverter _entityConverter;
         protected readonly IOnefuzzContext _context;
         protected readonly ILogTracer _logTracer;
+#pragma warning restore CA1051
 
 
         public Orm(ILogTracer logTracer, IOnefuzzContext context) {
@@ -136,7 +138,7 @@ namespace ApiService.OneFuzzLib.Orm {
     }
 
 
-    public class StatefulOrm<T, TState, Self> : Orm<T>, IStatefulOrm<T, TState> where T : StatefulEntityBase<TState> where TState : Enum {
+    public class StatefulOrm<T, TState, TSelf> : Orm<T>, IStatefulOrm<T, TState> where T : StatefulEntityBase<TState> where TState : Enum {
         static Lazy<Func<object>>? _partitionKeyGetter;
         static Lazy<Func<object>>? _rowKeyGetter;
         static ConcurrentDictionary<string, Func<T, Async.Task<T>>?> _stateFuncs = new ConcurrentDictionary<string, Func<T, Async.Task<T>>?>();
@@ -147,7 +149,7 @@ namespace ApiService.OneFuzzLib.Orm {
         static StatefulOrm() {
 
             /// verify that all state transition function have the correct signature:
-            var thisType = typeof(Self);
+            var thisType = typeof(TSelf);
             var states = Enum.GetNames(typeof(TState));
             var delegateType = typeof(StateTransition);
             MethodInfo delegateSignature = delegateType.GetMethod("Invoke")!;

src/ApiService/Directory.Build.props

@@ -4,10 +4,19 @@
         <!-- set overall target framework -->
         <TargetFramework>net6.0</TargetFramework>
 
+        <!-- build in Invariant mode: https://github.com/dotnet/runtime/blob/main/docs/design/features/globalization-invariant-mode.md -->
+        <!--
+        we never need locale-specific comparisons in the service, 
+        so turning this on has two effects:
+        - reduces bundle size of .NET service
+        - disables a lot of .NET code analyzers that check for 
+          correct use of locale-specific comparisons
+        -->
+        <InvariantGlobalization>true</InvariantGlobalization>
+
         <!-- enable code analysis -->
         <EnableNETAnalyzers>true</EnableNETAnalyzers>
-        <AnalysisLevel>6.0-Default</AnalysisLevel>
-        <!-- Goal: raise to 6.0-Minimum and then eventually 6.0-Recommended -->
+        <AnalysisLevel>6.0-Recommended</AnalysisLevel>
 
         <!-- check nullable types -->
         <Nullable>enable</Nullable>

src/ApiService/IntegrationTests/_FunctionTestBase.cs

@@ -65,6 +65,8 @@ public abstract class FunctionTestBase : IDisposable {
         => new EntityConverter().FromJsonString<T>(BodyAsString(data)) ?? throw new Exception($"unable to deserialize body as {typeof(T)}");
 
     public void Dispose() {
+        GC.SuppressFinalize(this);
+
         var (accountName, accountKey) = _storage.GetStorageAccountNameAndKey("").Result; // sync for test impls
         if (accountName is not null && accountKey is not null) {
             // clean up any tables & blobs that this test created

src/ApiService/Tests/OrmModelsTest.cs

@@ -439,19 +439,20 @@ namespace Tests {
             typeof(SecureString)
         });
         static bool IEnumerableEqual<T>(IEnumerable<T>? a, IEnumerable<T>? b) {
-            if (a is null && b is null) {
-                return true;
+            if (a is null) {
+                return b is null;
             }
-            if (a!.Count() != b!.Count()) {
+
+            if (b is null) {
                 return false;
             }
 
-            if (a!.Count() == 0 && b!.Count() == 0) {
-                return true;
+            if (a.Count() != b.Count()) {
+                return false;
             }
 
-            foreach (var v in a!.Zip(b!)) {
-                if (!AreEqual(v.First, v.Second)) {
+            foreach (var (first, second) in a.Zip(b)) {
+                if (!AreEqual(first, second)) {
                     return false;
                 }
             }

src/ApiService/Tests/SchedulerTests.cs

@@ -8,7 +8,7 @@ namespace Tests;
 
 public class SchedulerTests {
 
-    IEnumerable<Task> BuildTasks(int size) {
+    static IEnumerable<Task> BuildTasks(int size) {
         return Enumerable.Range(0, size).Select(i =>
             new Task(
                 Guid.Empty,
@@ -123,7 +123,7 @@ public class SchedulerTests {
         CheckBuckets(buckets, tasks, 12);
     }
 
-    void CheckBuckets(ILookup<Scheduler.BucketId, Task> buckets, List<Task> tasks, int bucketCount) {
+    static void CheckBuckets(ILookup<Scheduler.BucketId, Task> buckets, List<Task> tasks, int bucketCount) {
         Assert.Equal(buckets.Count, bucketCount);
 
         foreach (var task in tasks) {