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How to embed or-tools in a C# application?

I'm trying to follow the instructions at https://developers.google.com/optimization/introduction/installing.html#windows_binary so that I can use or-tools inside my C# application.
I'm stuck on the make all step. I am in the Developer Command Prompt, but this command says:
'make' is not recognized as an internal or external command,
operable program or batch file.
I tried downloading GNU make, but that fails also. make install says "no target", and a bare make says:
process_begin: CreateProcess(NULL, cl /EHsc /MD /nologo /D_SILENCE_STDEXT_HASH_DEPRECATION_WARNINGS -nologo /O2 -DNDEBUG -DUSE_CBC -DUSE_CLP /D__WIN32__ /Iinclude\src\windows /DGFLAGS_DLL_DECL= /DGFLAGS_DLL_DECLARE_FLAG= /DGFLAGS_DLL_DEFINE_FLAG= /Iinclude /Iexamples -DUSE_GLOP -DUSE_BOP -c examples\cpp\costas_array.cc /Foobjs\costas_array.obj, ...) failed.
make (e=2): The system cannot find the file specified.
make: *** [objs\\costas_array.obj] Error 2
I also tried copying the DLLs from the bin folder directly into my project. I was able to compile against them by doing this, but when I tried to run it I got an error:
System.BadImageFormatException: 'Could not load file or assembly 'Google.OrTools, Version=5.1.6235.37215, Culture=neutral, PublicKeyToken=7a052e3db761d3be' or one of its dependencies. An attempt was made to load a program with an incorrect format.'
What am I missing?

Regarding the System.BadImageFormatException:
The OrTools binary format is provided in a 64bit dll.
Make sure, that your project is set to 64bit:
In Visual Studio you can check it out by right clicking on the Project --> Properties --> Build, Platform Target: This should be set to x64.

In case you have the same issue with web application, just enable 64 bits on IIS Express using Tools -> Options -> Projects and Solutions -> Web Projects -> Use the 64-bit version on IIS Express for web sites and projects

I was having this issue when using OR-Tools in a Web Application (it worked fine in a console application). I was getting:
System.BadImageFormatException HResult=0x8007000B Message=Could not load file or assembly 'Google.OrTools' or one of its dependencies. An attempt was made to load a program with an incorrect format.
Using x64 didn't help, and Octopus was not building the project correctly either. The solution that worked for me was specifying which ASPNETCOMPILER to use (x64) in the project's .csproj :
<Project .... >
<PropertyGroup>
<AspNetToolPath>$(windir)\Microsoft.NET\Framework64\v4.0.30319</AspNetToolPath>
</PropertyGroup>

Could not load file or assembly Microsoft.Dynamics.BusinessConnectorNet

I'm using Visual Studio 2012, created a web-service that add/select data from Microsoft axapta 2009, when trying to add data I get the following error
Could not load file or assembly 'Microsoft.Dynamics.BusinessConnectorNet, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.
I've tried changing the project type to only x86 output and changed IIS server app pool settings to only x86. nothing worked for me

After searching for almost a week for a solution. the answer was in removing the reference of the connector from the front-end project and copying the business's connector to bin folder

This particular webapplication required the IIS to run in 64 bit mode and therefore this was changed. The Microsoft.DynamicsBusinessConnectorNet.dll that I was using was the 32bit version – which ofcourse was the cause of the error.
The solution was to enable the application pool to allow 32 bit application at IIS. This is done by:
Right clicking the application pool and selecting “advanced setting”
Set the “enable 32-bit applicataions” to true

CS1705 error while adding a C++ project to solution

Hi and thanks in advance.
I'm using TFS build 2013 (team services, not on premise) to build my solution. After creating a new C++ project in the solution I'm unable to build successfully.
The error I'm getting on the build machine is:
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\CodeAnalysis\Microsoft.CodeAnalysis.targets
(219): An error has occurred during compilation. error CS1705: Assembly 'Microsoft.Build.Utilities.Core,
Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' uses 'Microsoft.Build.Framework,
Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' which has a higher
version than referenced assembly 'Microsoft.Build.Framework, Version=12.0.0.0, Culture=neutral,
PublicKeyToken=b03f5f7f11d50a3a'
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\CodeAnalysis\Microsoft.CodeAnalysis.targets
(219): The "SetEnvironmentVariable" task was not found. Check the following: 1.) The name of the task in the project file is the same as the name
of the task class. 2.) The task class is "public" and implements the Microsoft.Build.Framework.ITask
interface. 3.) The task is correctly declared with <UsingTask> in the project file, or
in the *.tasks files located in the "C:\Program Files (x86)\MSBuild\14.0\bin\amd64" directory.
I've red about error CS1705 on the internet but I still don't understand why I get this error - the project is an empty project which has no references what so ever and no other project reference it either.
I'm targeting .NET framework 4.6.1 on all my C# projects and in my build definition I'm adding these msbuild arguments: /tv:14.0 /p:VisualStudioVersion=14.0 hence it uses the 2015's version of the c# compiler.
The target platform for this C++ project is VS 2015 (v140) as follows:
C++ project configuration
Needless to say that when I'm removing this project from the list of project to build (configuration manager) - the solution builds successfully.
Any help/clue would be greatly appreciated!

The problem was something other than what I thought it was. Seems it's got something to do with CodeAnalysis and some environment variable related to it.
In my build definition I'm disabling CodeAnalysis and even inside the C++ project properties It's explicitly disabled. After I commented out some attributes on the "SetCABuildNativeEnvironmentVariables" target inside this file on the build machine:
"C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\CodeAnalysis\Microsoft.CodeAnalysis.targets"
The problem disappered.
This is a nasty workaround however since I'm not fully aware of what's really happening.
Thanks a lot anyways!

Seems there are something still point to "Microsoft.Build.Framework, Version=12.0.0.0"
The /tv:14.0 command argument doesn't work as expected. See:
BuildActivity ignores ToolsVersion
As a workaround, you need to customize the build process template:
Open the template in Visual Studio and find the Run MSBuild for
Project MSBuild activity.
Set ToolVersion to "14.0".
Set ToolPath to target to MSBuild14 (by default: "C:\Program Files
(x86)\MSBuild\14.0\Bin").
Check in this build process template and re-queue the build.
You can also refer the answer from Marson in TFS 2013 building .NET 4.6 / C# 6.0

WebKit.NET with C# Project Runtime Exception

I have downloaded WebKit.NET 0.5-bin-cairo to work with an existing C# Project. I've included WebKitBrowser.dll and WebKit.Interop.dll as a reference to the module that requires it, as well as playing them directly in the debug/bin folder as directly by this tutorial.
I do not get any errors until I run the project and get an exception on this line in InitializeComponent() of the designer class.
this.webKitBrowser1 = new WebKit.WebKitBrowser();
The exception:
An unhandled exception of type 'System.ComponentModel.Win32Exception' occurred in WebKitBrowser.dll
Additional information: Failed to initialize activation context
I am building all the modules as 86x debug and my computer is 64 bit.
Any suggestions are appreciated as I've been playing around with this for multiple days.

I had encountered same issue. Three things were missing in my scenario.
manifest files: must be placed as all dlls are dynamically linked
VC++ must be installed on machine: In my case I used vc++2005 redistributable sp1.
Not only dlls/pdb/manifest you need to copy all the folders to root directory of executable
There is no correct packaging available yet for all files/folders of webkit.NET
And obviously project architecture should be x86 for all projects referencing webkit dlls

Have you tried:
WebKit.Net and OpenWebKitSharp Error: Failed to initialize activation context ? Namely to copy all the files from Core(not just the dlls) into your project /bin/release/ or /bin/debug/ folder?
quoted from the tutorial you followed:
Before we can run the application, WebKit.dll and it's dependencies must be present in the output directory. In Windows Explorer (or otherwise), copy all of the files from the WebKit .NET 'bin' directory to your project's output directory. For example, here is the listing of my output directory after copying:
D:\webkitdotnet\WebKitTest\WebKitTest\bin\Debug>ls
CFLite.dll icudt40.dll
JavaScriptCore.dll icuin40.dll
JavaScriptCore.resources icuuc40.dll
SQLite3.dll libcurl.dll
WebKit.Interop.dll libcurl.dll.manifest
WebKit.dll libeay32.dll
WebKit.resources libeay32.dll.manifest
WebKitBrowser.dll libpng13.dll
WebKitBrowser.dll.manifest libxml2.dll
WebKitBrowser.pdb libxslt.dll
WebKitTest.exe pthreadVC2.dll
WebKitTest.pdb ssleay32.dll
WebKitTest.vshost.exe ssleay32.dll.manifest
WebKitTest.vshost.exe.manifest zlib1.dll
curl.exe.manifest
You mentioned you only copied WebKitBrowser.dll and WebKit.Interop.dll over

BadImageFormatException in c#

I have downloaded tesseract from Here. When i tried to add the dll file to visual studio 2012, its showing error that its not an valid assembly. Can anyone suggest me some other dll file of ocr and sample coding. I've tried many websites but i dint found any good one. Then i found this dll file tessrect and used the following code
string path = #"C:\pic\mytext.jpg";
Bitmap image = new Bitmap(path);
Tesseract ocr = new Tesseract();
ocr.SetVariable("tessedit_char_whitelist", "0123456789"); // If digit only
ocr.Init(#"C:\tessdata\", "eng", false); // To use correct tessdata
List<tessnet2.Word> result = ocr.DoOCR(image, Rectangle.Empty);
foreach (tessnet2.Word word in result)
Console.WriteLine("{0} : {1}", word.Confidence, word.Text);
But visual studio throwing error that its not valid assembly. can anyone help me in this ...
Edit : Error is
Could not load file or assembly 'tessnet2_64, Version=2.0.4.0, Culture=neutral, PublicKeyToken=1550524b5ba07e29' or one of its dependencies. An attempt was made to load a program with an incorrect format.
Thanks n advance

The most common reason I've seen for this error is that the .NET app was built as X86 and you are including an x64 assembly, or vice versa.
Check the configuration manager in visual studio (Build menu) and what the assembly expects.
Update
According to this forum post the DLL you are using is an x86 assembly: https://code.google.com/p/tesseractdotnet/issues/detail?id=16 (unless they've created an x64 version since then)
In that case set your application to x86. If you don't have this available as yet, go into the Configuration Manager (Build menu), and set the Platform to x86. If it's not in the menu you can either edit the existing entries or create a new one by selecting that option in the drop down. If you select new: In the dialog, select the New Platform as x86 and copy the settings from what ever you were using currently.

In my case, this error occurred when I referenced a 32-bit project (DLL) in my 64-bit project.
It was necessary to change in the project configurations the target platform, to use preferably 32 bits:
Image:
When I checked the 32-bit preference, the problem was solved.