adaptation of AssertAll from http://blog.drorhelper.com/2011/02/multiple-asserts-done-right.html

AssertAll.cs

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace SomeNamespace
{
    /// <summary>
    /// Check and report multiple conditions in unit tests.
    /// 
    /// Adapted from: http://blog.drorhelper.com/2011/02/multiple-asserts-done-right.html
    /// </summary>
    public class AssertAll
    {
        public static void Execute(params Action[] assertionsToRun)
        {
            var errorMessages = new List<Exception>();
            foreach (var action in assertionsToRun)
            {
                try
                {
                    action.Invoke();
                }
                catch (Exception exc)
                {
                    errorMessages.Add(exc);
                }
            }

            if (errorMessages.Count <= 0)
                return;

            var errorText = new StringBuilder();
            foreach (Exception e in errorMessages)
            {
                if (errorText.Length > 0)
                    errorText.Append(Environment.NewLine);
                errorText.Append(digestStackTrace(e));
            }

            Assert.Fail(string.Format("{0}/{1} conditions failed:{2}{2}{3}", errorMessages.Count, assertionsToRun.Length,
                                      Environment.NewLine, errorText));
        }
  
        /// <summary>
        /// Remove boring lines in stack trace, where boring is a line either in the Execute method of this class 
        /// or anything in the Microsoft.VisualStudio.TestTools.UnitTesting package.
        /// </summary>
        private static object digestStackTrace(Exception e)
        {
            if (e is UnitTestAssertException)
            {
                var sb = new StringBuilder(e.Message).AppendLine();
                
                foreach (var line in e.StackTrace.Split(new string[] {Environment.NewLine}, StringSplitOptions.RemoveEmptyEntries))
                {
                    // don't report uninteresting stack trace lines.
                    if (line.Contains("Microsoft.VisualStudio.TestTools.UnitTesting") || line.Contains("AssertAll.Execute"))
                        continue;

                    sb.AppendLine(line);
                }

                return sb;
            }

            return e;
        }
    }
}