Roslyn:如何将多个项目的编译合并为一个单独的编译？

using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.MSBuild;

public class Compiler
{
    public static void MergeProjects(string solutionPath, string outputPath)
    {
        // 加载解决方案
        MSBuildWorkspace workspace = MSBuildWorkspace.Create();
        Solution solution = workspace.OpenSolutionAsync(solutionPath).Result;

        // 创建一个新的合并项目
        Project mergedProject = solution.AddProject("MergedProject", "MergedProject", LanguageNames.CSharp);

        // 将需要合并的项目添加到新项目中
        foreach (Project project in solution.Projects)
        {
            mergedProject = mergedProject.AddMetadataReferences(project.MetadataReferences);
            mergedProject = mergedProject.AddDocuments(project.Documents);
        }

        // 编译新项目
        CompilationOptions options = mergedProject.CompilationOptions.WithOutputKind(OutputKind.DynamicallyLinkedLibrary);
        Compilation compilation = mergedProject.GetCompilationAsync().Result.WithOptions(options);
        EmitResult result = compilation.Emit(outputPath);

        // 检查编译结果
        if (result.Success)
        {
            Console.WriteLine("合并编译成功！");
        }
        else
        {
            Console.WriteLine("合并编译失败！");
            foreach (Diagnostic diagnostic in result.Diagnostics)
            {
                Console.WriteLine(diagnostic.ToString());
            }
        }
    }
}