breaking: Change WriteSolutionFile to take a List<>

ICSharpCode.Decompiler/Solution/SolutionCreator.cs

@@ -41,7 +41,7 @@ namespace ICSharpCode.Decompiler.Solution
 		/// <exception cref="ArgumentException">Thrown when <paramref name="targetFile"/> is null or empty.</exception>
 		/// <exception cref="ArgumentNullException">Thrown when <paramref name="projects"/> is null.</exception>
 		/// <exception cref="InvalidOperationException">Thrown when <paramref name="projects"/> contains no items.</exception>
-		public static void WriteSolutionFile(string targetFile, IEnumerable<ProjectItem> projects)
+		public static void WriteSolutionFile(string targetFile, List<ProjectItem> projects)
 		{
 			if (string.IsNullOrWhiteSpace(targetFile))
 			{
@@ -53,19 +53,17 @@ namespace ICSharpCode.Decompiler.Solution
 				throw new ArgumentNullException(nameof(projects));
 			}
 
-			var projectList = projects.ToList();
+			if (!projects.Any())
-
-			if (!projectList.Any())
 			{
 				throw new InvalidOperationException("At least one project is expected.");
 			}
 
 			using (var writer = new StreamWriter(targetFile))
 			{
-				WriteSolutionFile(writer, projectList, targetFile);
+				WriteSolutionFile(writer, projects, targetFile);
 			}
 
-			FixProjectReferences(projectList);
+			FixProjectReferences(projects);
 		}
 
 		static void WriteSolutionFile(TextWriter writer, List<ProjectItem> projects, string solutionFilePath)

ILSpy/SolutionWriter.cs

@@ -153,8 +153,8 @@ namespace ICSharpCode.ILSpy
 				}
 				else
 				{
-					await Task.Run(() => SolutionCreator.WriteSolutionFile(solutionFilePath, projects))
+					await Task.Run(() => SolutionCreator.WriteSolutionFile(solutionFilePath, projects.ToList()))
-						.ConfigureAwait(false);
+							.ConfigureAwait(false);
 				}
 			}
 			catch (AggregateException ae)