主要：并非所有代码路径都会返回值

我正在制作列表并想在控制台中查看它。我有一个错误，它说：

Main()：并非所有代码路径都会返回值。

也许你可以帮助我？这是我的代码：

namespace ConsoleApplication5
{
    public class DocConfig
    {
        public string Description { get; set; }
        public List<DocPart> Parts { get; set; }
​
        public class DocPart
        {
            public string Title { get; set; }
            public string TexLine { get; set; }

            public class Program
            {
                public static int Main()
                {
                    List<DocPart> Parts = new List<DocPart>();
                    var doc = new DocConfig();
                    doc.Description = "bla bla";
                    doc.Parts = new List<DocPart>();
                    doc.Parts.Add(new DocPart { Title = "aaa", TexLine = @"\include{aaa.tex}" });
                    doc.Parts.Add(new DocPart { Title = "bbb", TexLine = @"\include{bbb.tex}" });
                    foreach (DocPart part in doc.Parts)
                    {
                        Console.WriteLine(part.Title);
                        {
                            Console.ReadLine();
                            return 0;
                        }
                    }
                }
            }
        }
    }
}

在末尾返回一些东西Main。像这样：

public static int Main()
{
     List<DocPart> Parts = new List<DocPart>();
     var doc = new DocConfig();
     doc.Description = "bla bla";
     doc.Parts = new List<DocPart>();
     doc.Parts.Add(new DocPart { Title = "aaa", TexLine = @"\include{aaa.tex}" });
     doc.Parts.Add(new DocPart { Title = "bbb", TexLine = @"\include{bbb.tex}" });
     foreach (DocPart part in doc.Parts)
     {
           Console.WriteLine(part.Title);
           {
                 Console.ReadLine();
                 return 0;
           }
     }

     return -1;
}