Update APIs to successfully Unload and Reload projects from Solution

src/VisualStudio/IntegrationTest/TestUtilities/Common/ProjectUtilities.cs

@@ -9,10 +9,13 @@ public abstract class Identity
 
     public class Project : Identity
     {
-        public Project(string name)
+        public Project(string name, string relativePath = null)
         {
             Name = name;
+            RelativePath = relativePath;
         }
+
+        public string RelativePath { get; }
     }
 
     public class ProjectReference : Identity

src/VisualStudio/IntegrationTest/TestUtilities/InProcess/SolutionExplorer_InProc.cs

@@ -808,10 +808,10 @@ private string GetAbsolutePathForProjectRelativeFilePath(string projectName, str
             return Path.Combine(projectPath, relativeFilePath);
         }
 
-        public void ReloadProject(string projectName)
+        public void ReloadProject(string projectRelativePath)
         {
             var solutionPath = Path.GetDirectoryName(_solution.FullName);
-            var projectPath = Path.Combine(solutionPath, projectName);
+            var projectPath = Path.Combine(solutionPath, projectRelativePath);
             _solution.AddFromFile(projectPath);
         }
 
@@ -827,9 +827,9 @@ public void ShowErrorList()
         public void ShowOutputWindow()
             => ExecuteCommand(WellKnownCommandNames.View_Output);
 
-        public void UnloadProject(string projectName)
+        public void UnloadProject(int index)
         {
-            var project = _solution.Projects.Item(projectName);
+            var project = _solution.Projects.Item(index);
             _solution.Remove(project);
         }
 

src/VisualStudio/IntegrationTest/TestUtilities/OutOfProcess/SolutionExplorer_OutOfProc.cs

@@ -116,8 +116,8 @@ public void CloseFile(ProjectUtils.Project project, string fileName, bool saveFi
         public void SaveFile(ProjectUtils.Project project, string fileName)
             => _inProc.SaveFile(project.Name, fileName);
 
-        public void ReloadProject(ProjectUtils.Project project)
-            => _inProc.ReloadProject(project.Name);
+        public void ReloadProject(string projectRelativePath)
+            => _inProc.ReloadProject(projectRelativePath);
 
         public void RestoreNuGetPackages()
             => _inProc.RestoreNuGetPackages();
@@ -128,8 +128,12 @@ public void SaveAll()
         public void ShowOutputWindow()
             => _inProc.ShowOutputWindow();
 
-        public void UnloadProject(ProjectUtils.Project project)
-            => _inProc.UnloadProject(project.Name);
+        /// <summary>
+        /// Unloads the project. <paramref name="index"/> is 1 based.
+        /// </summary>
+        /// <param name="index"></param>
+        public void UnloadProject(int index)
+            => _inProc.UnloadProject(index);
 
         public string[] GetProjectReferences(ProjectUtils.Project project)
             => _inProc.GetProjectReferences(project.Name);