Eagle Eye Studios
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namespace ConsoleApplication1
{
    class Program
    {
        [STAThread]
        static void Main(string[] args)
        {
            //Create a new OpenFileDialog, set its initial Selection to My Computer and enable multi selection
            var openFile = new OpenFileDialog
                               {
                                   Multiselect = true,
                                   InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyComputer)
                               };
            //Display the Dialog to the User and in case of a chosen file compile it.
            if (openFile.ShowDialog() == DialogResult.OK)
            {
                //Create a new instance of the XnaContentCompiler from namespace EES.ContentCompiler.Xna
                //and set its Output to a location (for example a temporary location)
                var xnaCompiler = new XnaContentCompiler(Application.UserAppDataPath)
                                      {
                                          //Set the platform we want to compiler for
                                          Platform = XnaPlatform.Windows,
                                          //Xna Version you want to use
                                          XnaVersion = XnaVersion.FourZero,
                                          //If you want to use XNA 4 you also have to set the XnaProfile. Default is Reach.
                                          XnaProfile = XnaProfile.Reach
                                      };
                //Add the files to the Compiler
                foreach (var fileName in openFile.FileNames)
                {
                    //Some Sample Compiler Options for a Texture. Options are the same like in VS but without spaces.
                    var compilerOptions = new SerializableDictionary<string, object>
                                              {
                                                  {"GenerateMipmaps", false},
                                                  {"ResizeToPowerOfTwo", true},
                                                  {"TextureFormat", "DxtCompressed"}
                                              };
                    //Create a new FileObject and add it to the compiler
                    var file = new File(fileName, compilerOptions);
                    xnaCompiler.Files.Add(file);
                }

                //Now its time for some Compiler Magic!
                //Compile and Write Errors to output
                Console.WriteLine(xnaCompiler.Build("test.ccuild"));