Fix sln references (#5286)

* Check for slnx file also

* Remove unused method from test fixture

Author: bording

src/ServiceControl.Audit.Persistence.Tests/PersistenceTestFixture.cs

@@ -2,8 +2,6 @@
 {
     using System;
     using System.Diagnostics;
-    using System.IO;
-    using System.Linq;
     using System.Threading;
     using System.Threading.Tasks;
     using Auditing.BodyStorage;
@@ -32,26 +30,6 @@ public virtual Task Cleanup()
             return configuration?.Cleanup();
         }
 
-        protected string GetManifestPath()
-        {
-            var currentFolder = new DirectoryInfo(TestContext.CurrentContext.TestDirectory);
-
-            while (currentFolder != null)
-            {
-                var file = currentFolder.EnumerateFiles("*.sln", SearchOption.TopDirectoryOnly)
-                    .SingleOrDefault();
-
-                if (file != null)
-                {
-                    return Path.Combine(file.Directory.FullName, $"ServiceControl.Audit.Persistence.{PersisterName}", "persistence.manifest");
-                }
-
-                currentFolder = currentFolder.Parent;
-            }
-
-            throw new Exception($"Cannot find manifest folder for {PersisterName}");
-        }
-
         protected string PersisterName => configuration.Name;
 
         protected IAuditDataStore DataStore => configuration.AuditDataStore;

src/ServiceControl.Transports.Learning/LearningTransportCustomization.cs

@@ -50,7 +50,7 @@ internal static string FindStoragePath(string connectionString)
 
             while (true)
             {
-                if (Directory.EnumerateFiles(directory).Any(file => file.EndsWith(".sln")))
+                if (Directory.EnumerateFiles(directory).Any(file => file.EndsWith(".sln") || file.EndsWith(".slnx")))
                 {
                     return Path.Combine(directory, ".learningtransport");
                 }