问表达式树上的ToString会产生格式错误的输出

EN

// Code is probably adapted from some other answer, don't remember
public static void CompileToAssemblyFile(
  this LambdaExpression expression,
  string outputFilePath = null,
  string assemblyAndModuleName = null,
  string typeName = "TheType",
  string methodName = "TheMethod",
  // Adjust this
  string ilSpyPath = @"C:\path\to\ILSpy.exe")
{
  assemblyAndModuleName = assemblyAndModuleName ?? nameof(CompileToAssemblyFile);

  outputFilePath = outputFilePath ??
                   Path.Combine(
                     Path.GetTempPath(),
                     $"{assemblyAndModuleName}_{DateTime.Now:yyyy-MM-dd_HH_mm_ss}_{Guid.NewGuid()}.dll");

  var domain = AppDomain.CurrentDomain;
  var asmName = new AssemblyName {Name = assemblyAndModuleName};

  var asmBuilder = domain.DefineDynamicAssembly(
    asmName,
    AssemblyBuilderAccess.RunAndSave,
    Path.GetDirectoryName(outputFilePath));

  string outputFileName = Path.GetFileName(outputFilePath);

  var module = asmBuilder.DefineDynamicModule(
    assemblyAndModuleName,
    outputFileName,
    true);

  var typeBuilder = module.DefineType(typeName, TypeAttributes.Public);

  var methodBuilder = typeBuilder.DefineMethod(
    methodName,
    MethodAttributes.Public | MethodAttributes.Static,
    expression.ReturnType,
    expression.Parameters.Select(p => p.Type).ToArray());

  var pdbGenerator = DebugInfoGenerator.CreatePdbGenerator();

  expression.CompileToMethod(methodBuilder, pdbGenerator);

  typeBuilder.CreateType();

  asmBuilder.Save(outputFileName);

  Process.Start(ilSpyPath, outputFilePath);
}