diff --git a/.gitignore b/.gitignore
index 009d238..2d71489 100644
--- a/.gitignore
+++ b/.gitignore
@@ -71,4 +71,5 @@ Documentation-*/
 *.crunchsolution.xml
 *.ncrunchsolution
 *.ncrunchsolution.user
-*.ncrunchproject
\ No newline at end of file
+*.ncrunchproject
+_NCrunch_*/
diff --git a/TddToolkit/ImplementationDetails/AssertionRecorder.cs b/TddToolkit/ImplementationDetails/AssertionRecorder.cs
index 6d962b6..04eeab2 100644
--- a/TddToolkit/ImplementationDetails/AssertionRecorder.cs
+++ b/TddToolkit/ImplementationDetails/AssertionRecorder.cs
@@ -3,34 +3,43 @@
 using System.Linq;
 using System.Text;
 using FluentAssertions;
+using System.Diagnostics;
 
 namespace TddEbook.TddToolkit.ImplementationDetails
 {
   public class AssertionRecorder
   {
-    public List<Exception> _exceptions = new List<Exception>();
+    private int assertionNumber = 1;
+    public List<AssertionFailed> _exceptions = new List<AssertionFailed>();
 
     internal void AssertTrue()
     {
       XAssert.Equal(0, _exceptions.Count, ExtractMessagesFromAll(_exceptions));
     }
 
-    private string ExtractMessagesFromAll(List<Exception> _exceptions)
+    private string ExtractMessagesFromAll(List<AssertionFailed> _failedAssertions)
     {
       string result = "the following assertions shouldn't have failed: " + Environment.NewLine;
-      foreach (var e in _exceptions)
+      foreach (var failedAssertion in _failedAssertions)
       {
-        result += e.Message + Environment.NewLine;
+        result += failedAssertion.Header();
       }
 
-      foreach (var e in _exceptions)
+      foreach (var failedAssertion in _failedAssertions)
       {
-        result += e + Environment.NewLine;
+        result += failedAssertion + Environment.NewLine;
       }
 
       return result;
     }
 
+    private string ExtractDescriptionFrom(Exception e)
+    {
+      var st = new StackTrace(e, true);
+      var frame = st.GetFrames().Last();
+      return frame.ToString();
+    }
+
     public void Equal<T>(T expected, T actual)
     {
       LogException(() => XAssert.Equal(expected, actual));
@@ -76,9 +85,27 @@ public void Alike<T>(T expected, T actual)
       LogException(() => XAssert.Alike(expected, actual));
     }
 
+    public void IsInstanceOf<T>(object o)
+    {
+      LogException(() => o.Should().BeOfType<T>());
+    }
+
+    public void IsAssignableTo<T>(object o)
+    {
+      LogException(() => o.Should().BeAssignableTo<T>());
+    }
+
+    public void Null(object o)
+    {
+      LogException(() => o.Should().BeNull());
+    }
 
+    public void Same<T>(T expected, T other)
+    {
+      LogException(() => other.Should().BeSameAs(expected));
+    }
 
-    public void LogException(Action action)
+    internal void LogException(Action action)
     {
       try
       {
@@ -86,8 +113,37 @@ public void LogException(Action action)
       }
       catch (Exception e)
       {
-        _exceptions.Add(e);
+        _exceptions.Add(AssertionFailed.With(e, assertionNumber));
       }
+      
+      assertionNumber++;
+    }
+  }
+
+  public class AssertionFailed
+  {
+    private Exception e;
+    private int assertionNumber;
+
+    public AssertionFailed(Exception e, int assertionNumber)
+    {
+      this.e = e;
+      this.assertionNumber = assertionNumber;
+    }
+
+    public static AssertionFailed With(Exception e, int assertionNumber)
+    {
+      return new AssertionFailed(e, assertionNumber);
+    }
+
+    public string Header()
+    {
+      return "Assertion no. " + assertionNumber + " failed: " + e.Message + " " + Environment.NewLine;
+    }
+
+    public override string ToString()
+    {
+      return e.ToString();
     }
   }
 }
diff --git a/TddToolkit/XAssert.Reflection.cs b/TddToolkit/XAssert.Reflection.cs
index 976df5c..d2f37c6 100644
--- a/TddToolkit/XAssert.Reflection.cs
+++ b/TddToolkit/XAssert.Reflection.cs
@@ -17,8 +17,11 @@ public static void AttributeExistsOnMethodOf<T>(
         method.HasAttribute(attr.GetType(), attr).Should().BeTrue();
       }
 
-
-
+      public static void AttributeExistsOnMethodOf<T, TAttr>(Expression<Action<T>> methodExpression)
+      {
+        var method = Method.Of<T>(methodExpression);
+        method.HasAttribute<TAttr>().Should().BeTrue();
+      }
     }
 
     public class Method
diff --git a/TddToolkitSpecification/XAssertSpecification.cs b/TddToolkitSpecification/XAssertSpecification.cs
index 8ea149c..ba7b844 100644
--- a/TddToolkitSpecification/XAssertSpecification.cs
+++ b/TddToolkitSpecification/XAssertSpecification.cs
@@ -46,19 +46,20 @@ public void ShouldAggregateMultipleAssertionsWhenAssertionAll()
           assert.Equal(1, 3);
           assert.Equal(2, 44);
           assert.Equal("aa", "123");
+          assert.True(true);
           assert.Contains("bb", "aa");
         })
       );
 
-      StringAssert.Contains("Expected object to be 1, but found 3", 
+      StringAssert.Contains("Assertion no. 1 failed: Expected object to be 1, but found 3", 
         exception.ToString());
-      StringAssert.Contains("Expected object to be 2, but found 44", 
+      StringAssert.Contains("Assertion no. 2 failed: Expected object to be 2, but found 44", 
         exception.ToString());
-      StringAssert.Contains("Expected object to be \"aa\", but found \"123\"", 
+      StringAssert.Contains("Assertion no. 3 failed: Expected object to be \"aa\", but found \"123\"", 
         exception.ToString());
-      StringAssert.Contains("Expected string \"bb\" to contain \"aa\"",
+      StringAssert.DoesNotContain("Assertion no. 4 failed", exception.ToString());
+      StringAssert.Contains("Assertion no. 5 failed: Expected string \"bb\" to contain \"aa\"",
         exception.ToString());
-
     }
 
     [Test]