Test/UnitTestProject1/UnitTest1.cs

using WpfApp1;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System;

namespace UnitTestProject1
{
    [TestClass]
    public class UnitTest1
    {
        [TestMethod]
        public void TestMethodTextBoxIsNotNull()
        {
            
        }
    }
}