Does not contain a static main method suitable for an entry point

Question

I began organizing my code to day into seperarate  cs files  and in order to allow the methods that work with the UI to continue to do so I would create the  cs code under the same namespace and public partial class name so the methods could be inter-operable    My header look like this in four files  including my main core file that calls    public shell     InitializeComponent         Header area of  cs files that work with the UI  and seem to be causing this new conflict    using System  using System Windows Forms  using System Collections Generic  using System ComponentModel  using System Data  using System Drawing  using System Linq  using System Text  using System Text RegularExpressions  using System IO  using System Data SqlServerCe  using System Diagnostics  using System Threading  using System Collections Specialized  using System Net  using System Runtime InteropServices  using watin   WatiN Core  using WatiN Core Native InternetExplorer  using System Web     namespace WindowsFormsApplication1        public partial class shell   Form         Now when I try to debug preview my application  BTW this is a Windows Application within Visual Studio 2010 Express  I get this error message      Does not contain a static  main  method suitable for an entry point   I looked in the application properties in Application- Startup object  but it offers me no options  How can I inform the application to begin at the  cs file that has my InitializeComponent    command     I ve looked around so far without a solution  The properties on each  cs file are set to  Compile   I do not see an App xaml file in my Solutions explorer but I do see a app config file    I m still very new and this is my first attempt at an organizing method with c  code

User · Answer

After placing the above code in Program cs  follow these steps    Right click on the project Select  Properties  Set  Output Type  to  Windows Application  Startup object   namepace Program

User · Answer

Try adding this method to a class and see if you still get the error    STAThread  static void Main

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For me  the error was actually produced by  Feature  async main  is not available in C  7 0  Please use language version 7 1 or greater   This issue was resulting in the  Does not contain a static  main  method suitable for an entry point  message in the Error List  but the Output window showed the  not available  error  To correct this  I changed the language version from  C  latest minor version  default   to  C  latest minor version  latest   under Advanced Build Settings

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Check to see if the project is set as the  Startup Project   Right click on the project and choose  Set as Startup Project  from the menu

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If you don t have a file named Program cs  just add a new Class and name it Program cs    Then paste this code    using System   using System Collections Generic   using System Linq   using System Text   using System Windows Forms    namespace Sales        static class Program                  lt summary gt               The main entry point for the application                lt  summary gt            STAThread           static void Main                  Application EnableVisualStyles                 Application SetCompatibleTextRenderingDefault false                Application Run new Form1

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Edit  csproj file   lt OutputType gt Library lt  OutputType gt   cheers

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Looks like a Windows Forms project that is trying to use a startup form but for some reason the project properties is set to startup being Main   If you have enabled application framework you may not be able to see that Main is active  this is an invalid configuration

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If you are using a class library project then set Class Library as output type in properties under application section of project

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If you are like me  then you might have started with a Class Library  and then switched this to a Console Application   If so  change this     namespace ClassLibrary1       public class Class1                 To this     namespace ConsoleApp1       class Program               static void Main string   args

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Had this problem in VS 2017 caused by   static async Task Main string   args    Feature  async main  is not available in C  7 0  Please use language version 7 1 or greater   Adding    lt LangVersion gt latest lt  LangVersion gt   to app csproj helped

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If you do have a Main method but still get this error  make sure that the file containing the Main method has  Build action  set to  Compile  and  Copy to ouput directory  set to  Do not copy

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A valid entry looks like   public static class ConsoleProgram                STAThread          static void Main                         Console WriteLine  Got here                Console ReadLine                      I had issues as I m writing a web application  but for the dreadly loading time  I wanted to quickly convert the same project to a console application and perform quick method tests without loading the entire solution   My entry point was placed in  App Code Main cs  and I had to do the following    Set Project -  Properties -  Application -  Output type   Console Application Create the  App Code Main cs Add the code above in it  and reference the methods in my project  Right click on the Main cs file -  Properties -  Build Action   Compile   After this  I can set the output  as mentioned in Step 1  to Class Library to start the web site  or Console Application to enter the console mode   Why I did this instead of 2 separate projects   Simply because I had references to Entity Framework and other specific references that created problems running 2 separate projects   For easier solutions  I would still recommend 2 separate projects as the console output is mainly test code and you probably don t want to risk that going out in production code

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I too have faced this problem  Then I realized that I was choosing Console Application Package  rather than Console Application

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hey i got same error and the solution to this error is just write Capital M instead of small m   eg - static void Main   I hope it helps

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If you do indeed have a public static main method it could be your build settings as explained in this question  Troubleshooting  quot program does not contain a static   39 Main  39  method quot  when it clearly does

User · Answer

I was looking at this issue as well  and in my case the solution was too easy  I added a new empty project to the solution  The newly added project is automatically set as a console application  But since the project added was a  empty  project  no Program cs existed in that new project   As expected   All I needed to do was change the output type of the project properties to Class library

User · Answer

Change the Output Type under the Project   Properties to that of a    Class Library     By default  this setting may have been set to a    Console Application

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Select App xaml and display its properties  Set Build Action to ApplicationDefinition  App xaml and its corresponding   cs file must be placed into the root directory of the   csproj file  i  e  not into a  Source  folder

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For future readers who faced same issue with Windows Forms Application  one solution is to add these lines to your main start up form class        STAThread      static void Main                 Application EnableVisualStyles            Application SetCompatibleTextRenderingDefault false           Application Run new MyMainForm             Then go to project properties   Application   Startup Object dropdown  should see the namespace MyMainForm  select it  clean and build the solution  And it should work

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I had this error and solved it using this solution    Right click on the project Select  Properties  Set  Output Type  to  Class Library

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Salaam   I have both Visual Studio 2017 and Visual Studio 2019  Visual Studio 2019 does not show this error but 2017 does  Try Installing Visual Studio 2019     Visual Studio 2017        Visual Studio 2019

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Perhaps unintentional  but moving my docker file to the solution folder instead of the project eliminated the error  This was helpful when I still wanted to run the solution independently of docker

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For some others coming here   In my case I had copied a  csproj from a sample project which included  lt EnableDefaultCompileItems gt false lt  EnableDefaultCompileItems gt  without including the Program cs file  Fix was to either remove EnableDefaultCompileItems or include Program cs in the compile explicitly

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hellow your main class was deleted so add new class that name set as Main cs and pest that code or  if porblem in window so same problem on that  using System  using System Collections Generic  using System Linq  using Foundation  using UIKit   namespace your PKG name iOS          public class Application                          This is the main entry point of the application              static void Main string   args                                   if you want to use a different Application Delegate class from  AppDelegate                     you can specify it here                  UIApplication Main args  null   AppDelegate

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I am using Visual Studio and also had this problem  It took me some time  but in my program it was caused because I accidentally deleted a Class named  Program  that is generated automatically

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When you want to allow paramaters to be specified from the command  they must look like this     STAThread   static void Main params string   paramaters       you cannot specify more than one paramater  otherwise this will also cause the error reported above

[c#] Does not contain a static 'main' method suitable for an entry point

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