VS Bouncer

VSBouncer.cs

using System;
using EnvDTE;

namespace VSBouncer
{
	class Program
	{
		static void Main(string[] args)
		{
			var command = args[0];
			var solutionPath = args[1];

			DTE dte = (DTE)System.Runtime.InteropServices.Marshal.GetActiveObject("VisualStudio.DTE.10.0");
			
			var solution = dte.Solution;

			var fullPath = System.IO.Path.GetFullPath(solutionPath);

			if (command.Equals("open", StringComparison.OrdinalIgnoreCase))
				solution.Open(fullPath);

			if (command.Equals("close", StringComparison.OrdinalIgnoreCase))
				solution.Close(true);
		}
	}
}