diff --git a/exercises/anagram/AnagramTest.cs b/exercises/anagram/AnagramTest.cs
index ccbd6f4f78..a346c824c0 100644
--- a/exercises/anagram/AnagramTest.cs
+++ b/exercises/anagram/AnagramTest.cs
@@ -1,4 +1,4 @@
-// This file was auto-generated based on version 1.4.0 of the canonical data.
+// This file was auto-generated based on version 1.4.1 of the canonical data.
 
 using Xunit;
 
@@ -83,7 +83,7 @@ public void Detects_anagrams_using_case_insensitive_possible_matches()
     }
 
     [Fact(Skip = "Remove to run test")]
-    public void Does_not_detect_a_anagram_if_the_original_word_is_repeated()
+    public void Does_not_detect_an_anagram_if_the_original_word_is_repeated()
     {
         var candidates = new[] { "go Go GO" };
         var sut = new Anagram("go");
diff --git a/exercises/armstrong-numbers/ArmstrongNumbersTest.cs b/exercises/armstrong-numbers/ArmstrongNumbersTest.cs
index bbc3cc05ff..f878c0b726 100644
--- a/exercises/armstrong-numbers/ArmstrongNumbersTest.cs
+++ b/exercises/armstrong-numbers/ArmstrongNumbersTest.cs
@@ -1,10 +1,16 @@
-// This file was auto-generated based on version 1.0.0 of the canonical data.
+// This file was auto-generated based on version 1.1.0 of the canonical data.
 
 using Xunit;
 
 public class ArmstrongNumbersTest
 {
     [Fact]
+    public void Zero_is_an_armstrong_number()
+    {
+        Assert.True(ArmstrongNumbers.IsArmstrongNumber(0));
+    }
+
+    [Fact(Skip = "Remove to run test")]
     public void Single_digit_numbers_are_armstrong_numbers()
     {
         Assert.True(ArmstrongNumbers.IsArmstrongNumber(5));
diff --git a/exercises/darts/DartsTest.cs b/exercises/darts/DartsTest.cs
index 3cfbbbec96..6c82f48fe4 100644
--- a/exercises/darts/DartsTest.cs
+++ b/exercises/darts/DartsTest.cs
@@ -1,48 +1,84 @@
-// This file was auto-generated based on version 1.1.0 of the canonical data.
+// This file was auto-generated based on version 2.2.0 of the canonical data.
 
 using Xunit;
 
 public class DartsTest
 {
     [Fact]
-    public void A_dart_lands_outside_the_target()
+    public void Missed_target()
     {
         Assert.Equal(0, Darts.Score(-9, 9));
     }
 
     [Fact(Skip = "Remove to run test")]
-    public void A_dart_lands_just_in_the_border_of_the_target()
+    public void On_the_outer_circle()
     {
         Assert.Equal(1, Darts.Score(0, 10));
     }
 
     [Fact(Skip = "Remove to run test")]
-    public void A_dart_lands_in_the_outer_circle()
+    public void On_the_middle_circle()
     {
-        Assert.Equal(1, Darts.Score(4, 4));
+        Assert.Equal(5, Darts.Score(-5, 0));
     }
 
     [Fact(Skip = "Remove to run test")]
-    public void A_dart_lands_right_in_the_border_between_outer_and_middle_circles()
+    public void On_the_inner_circle()
     {
-        Assert.Equal(5, Darts.Score(5, 0));
+        Assert.Equal(10, Darts.Score(0, -1));
+    }
+
+    [Fact(Skip = "Remove to run test")]
+    public void Exactly_on_centre()
+    {
+        Assert.Equal(10, Darts.Score(0, 0));
+    }
+
+    [Fact(Skip = "Remove to run test")]
+    public void Near_the_centre()
+    {
+        Assert.Equal(10, Darts.Score(-0.1, -0.1));
+    }
+
+    [Fact(Skip = "Remove to run test")]
+    public void Just_within_the_inner_circle()
+    {
+        Assert.Equal(10, Darts.Score(0.7, 0.7));
     }
 
     [Fact(Skip = "Remove to run test")]
-    public void A_dart_lands_in_the_middle_circle()
+    public void Just_outside_the_inner_circle()
     {
         Assert.Equal(5, Darts.Score(0.8, -0.8));
     }
 
     [Fact(Skip = "Remove to run test")]
-    public void A_dart_lands_right_in_the_border_between_middle_and_inner_circles()
+    public void Just_within_the_middle_circle()
     {
-        Assert.Equal(10, Darts.Score(0, -1));
+        Assert.Equal(5, Darts.Score(-3.5, 3.5));
     }
 
     [Fact(Skip = "Remove to run test")]
-    public void A_dart_lands_in_the_inner_circle()
+    public void Just_outside_the_middle_circle()
     {
-        Assert.Equal(10, Darts.Score(-0.1, -0.1));
+        Assert.Equal(1, Darts.Score(-3.6, -3.6));
+    }
+
+    [Fact(Skip = "Remove to run test")]
+    public void Just_within_the_outer_circle()
+    {
+        Assert.Equal(1, Darts.Score(-7, 7));
+    }
+
+    [Fact(Skip = "Remove to run test")]
+    public void Just_outside_the_outer_circle()
+    {
+        Assert.Equal(0, Darts.Score(7.1, -7.1));
+    }
+
+    [Fact(Skip = "Remove to run test")]
+    public void Asymmetric_position_between_the_inner_and_middle_circles()
+    {
+        Assert.Equal(5, Darts.Score(0.5, -4));
     }
 }
\ No newline at end of file
diff --git a/exercises/diffie-hellman/DiffieHellmanTest.cs b/exercises/diffie-hellman/DiffieHellmanTest.cs
index 3cb9ca503c..2f96a8f8fe 100644
--- a/exercises/diffie-hellman/DiffieHellmanTest.cs
+++ b/exercises/diffie-hellman/DiffieHellmanTest.cs
@@ -50,10 +50,10 @@ public void Key_exchange()
         var g = new BigInteger(5);
         var alicePrivateKey = DiffieHellman.PrivateKey(p);
         var bobPrivateKey = DiffieHellman.PrivateKey(p);
-        var alicePublicKey = DiffieHellman.PublicKey(p, g, alicePrivateKey);
-        var bobPublicKey = DiffieHellman.PublicKey(p, g, bobPrivateKey);
-        var secretA = DiffieHellman.Secret(p, bobPublicKey, alicePrivateKey);
-        var secretB = DiffieHellman.Secret(p, alicePublicKey, bobPrivateKey);
+        var alicePublicKey = DiffieHellman.PublicKey(p,G,AlicePrivateKey);
+        var bobPublicKey = DiffieHellman.PublicKey(p,G,BobPrivateKey);
+        var secretA = DiffieHellman.Secret(p,BobPublicKey,AlicePrivateKey);
+        var secretB = DiffieHellman.Secret(p,AlicePublicKey,BobPrivateKey);
         Assert.Equal(secretA, secretB);
     }
 }
\ No newline at end of file
diff --git a/exercises/forth/ForthTest.cs b/exercises/forth/ForthTest.cs
index 45ca6398f3..a846e7d763 100644
--- a/exercises/forth/ForthTest.cs
+++ b/exercises/forth/ForthTest.cs
@@ -1,4 +1,4 @@
-// This file was auto-generated based on version 1.7.0 of the canonical data.
+// This file was auto-generated based on version 1.7.1 of the canonical data.
 
 using System;
 using Xunit;
diff --git a/exercises/luhn/LuhnTest.cs b/exercises/luhn/LuhnTest.cs
index f7ea5080a4..d4c6d42b19 100644
--- a/exercises/luhn/LuhnTest.cs
+++ b/exercises/luhn/LuhnTest.cs
@@ -1,4 +1,4 @@
-// This file was auto-generated based on version 1.4.0 of the canonical data.
+// This file was auto-generated based on version 1.6.1 of the canonical data.
 
 using Xunit;
 
@@ -53,9 +53,9 @@ public void Valid_number_with_an_even_number_of_digits()
     }
 
     [Fact(Skip = "Remove to run test")]
-    public void Valid_strings_with_a_non_digit_included_become_invalid()
+    public void Valid_number_with_an_odd_number_of_spaces()
     {
-        Assert.False(Luhn.IsValid("055a 444 285"));
+        Assert.True(Luhn.IsValid("234 567 891 234"));
     }
 
     [Fact(Skip = "Remove to run test")]
@@ -73,7 +73,7 @@ public void Valid_strings_with_punctuation_included_become_invalid()
     [Fact(Skip = "Remove to run test")]
     public void Valid_strings_with_symbols_included_become_invalid()
     {
-        Assert.False(Luhn.IsValid("055£ 444$ 285"));
+        Assert.False(Luhn.IsValid("055# 444$ 285"));
     }
 
     [Fact(Skip = "Remove to run test")]
@@ -95,7 +95,13 @@ public void Input_digit_9_is_correctly_converted_to_output_digit_9()
     }
 
     [Fact(Skip = "Remove to run test")]
-    public void Strings_with_non_digits_is_invalid()
+    public void Using_ascii_value_for_non_doubled_non_digit_isnt_allowed()
+    {
+        Assert.False(Luhn.IsValid("055b 444 285"));
+    }
+
+    [Fact(Skip = "Remove to run test")]
+    public void Using_ascii_value_for_doubled_non_digit_isnt_allowed()
     {
         Assert.False(Luhn.IsValid(":9"));
     }
diff --git a/exercises/pangram/PangramTest.cs b/exercises/pangram/PangramTest.cs
index 108caf8392..059892bfdb 100644
--- a/exercises/pangram/PangramTest.cs
+++ b/exercises/pangram/PangramTest.cs
@@ -1,47 +1,47 @@
-// This file was auto-generated based on version 1.4.1 of the canonical data.
+// This file was auto-generated based on version 2.0.0 of the canonical data.
 
 using Xunit;
 
 public class PangramTest
 {
     [Fact]
-    public void Sentence_empty()
+    public void Empty_sentence()
     {
         Assert.False(Pangram.IsPangram(""));
     }
 
     [Fact(Skip = "Remove to run test")]
-    public void Recognizes_a_perfect_lower_case_pangram()
+    public void Perfect_lower_case()
     {
         Assert.True(Pangram.IsPangram("abcdefghijklmnopqrstuvwxyz"));
     }
 
     [Fact(Skip = "Remove to run test")]
-    public void Pangram_with_only_lower_case()
+    public void Only_lower_case()
     {
         Assert.True(Pangram.IsPangram("the quick brown fox jumps over the lazy dog"));
     }
 
     [Fact(Skip = "Remove to run test")]
-    public void Missing_character_x()
+    public void Missing_the_letter_x()
     {
         Assert.False(Pangram.IsPangram("a quick movement of the enemy will jeopardize five gunboats"));
     }
 
     [Fact(Skip = "Remove to run test")]
-    public void Another_missing_character_e_g_h()
+    public void Missing_the_letter_h()
     {
         Assert.False(Pangram.IsPangram("five boxing wizards jump quickly at it"));
     }
 
     [Fact(Skip = "Remove to run test")]
-    public void Pangram_with_underscores()
+    public void With_underscores()
     {
         Assert.True(Pangram.IsPangram("the_quick_brown_fox_jumps_over_the_lazy_dog"));
     }
 
     [Fact(Skip = "Remove to run test")]
-    public void Pangram_with_numbers()
+    public void With_numbers()
     {
         Assert.True(Pangram.IsPangram("the 1 quick brown fox jumps over the 2 lazy dogs"));
     }
@@ -53,13 +53,13 @@ public void Missing_letters_replaced_by_numbers()
     }
 
     [Fact(Skip = "Remove to run test")]
-    public void Pangram_with_mixed_case_and_punctuation()
+    public void Mixed_case_and_punctuation()
     {
         Assert.True(Pangram.IsPangram("\"Five quacking Zephyrs jolt my wax bed.\""));
     }
 
     [Fact(Skip = "Remove to run test")]
-    public void Upper_and_lower_case_versions_of_the_same_character_should_not_be_counted_separately()
+    public void Case_insensitive()
     {
         Assert.False(Pangram.IsPangram("the quick brown fox jumps over with lazy FX"));
     }
diff --git a/exercises/queen-attack/QueenAttackTest.cs b/exercises/queen-attack/QueenAttackTest.cs
index 617849966b..d8c025d624 100644
--- a/exercises/queen-attack/QueenAttackTest.cs
+++ b/exercises/queen-attack/QueenAttackTest.cs
@@ -1,4 +1,4 @@
-// This file was auto-generated based on version 2.2.0 of the canonical data.
+// This file was auto-generated based on version 2.3.0 of the canonical data.
 
 using System;
 using Xunit;
@@ -86,8 +86,8 @@ public void Can_attack_on_third_diagonal()
     [Fact(Skip = "Remove to run test")]
     public void Can_attack_on_fourth_diagonal()
     {
-        var whiteQueen = QueenAttack.Create(2,2);
-        var blackQueen = QueenAttack.Create(5,5);
+        var whiteQueen = QueenAttack.Create(1,7);
+        var blackQueen = QueenAttack.Create(0,6);
         Assert.True(QueenAttack.CanAttack(whiteQueen, blackQueen));
     }
 }
\ No newline at end of file
diff --git a/exercises/rational-numbers/RationalNumbersTest.cs b/exercises/rational-numbers/RationalNumbersTest.cs
index e9f35ac4ae..ad19fa7baf 100644
--- a/exercises/rational-numbers/RationalNumbersTest.cs
+++ b/exercises/rational-numbers/RationalNumbersTest.cs
@@ -1,4 +1,4 @@
-// This file was auto-generated based on version 1.0.0 of the canonical data.
+// This file was auto-generated based on version 1.1.0 of the canonical data.
 
 using Xunit;
 
@@ -118,12 +118,24 @@ public void Absolute_value_of_a_positive_rational_number()
         Assert.Equal(new RationalNumber(1, 2), new RationalNumber(1, 2).Abs());
     }
 
+    [Fact(Skip = "Remove to run test")]
+    public void Absolute_value_of_a_positive_rational_number_with_negative_numerator_and_denominator()
+    {
+        Assert.Equal(new RationalNumber(1, 2), new RationalNumber(-1, -2).Abs());
+    }
+
     [Fact(Skip = "Remove to run test")]
     public void Absolute_value_of_a_negative_rational_number()
     {
         Assert.Equal(new RationalNumber(1, 2), new RationalNumber(-1, 2).Abs());
     }
 
+    [Fact(Skip = "Remove to run test")]
+    public void Absolute_value_of_a_negative_rational_number_with_negative_denominator()
+    {
+        Assert.Equal(new RationalNumber(1, 2), new RationalNumber(1, -2).Abs());
+    }
+
     [Fact(Skip = "Remove to run test")]
     public void Absolute_value_of_zero()
     {
diff --git a/exercises/reverse-string/ReverseStringTest.cs b/exercises/reverse-string/ReverseStringTest.cs
index 611e62c206..557c30b7c9 100644
--- a/exercises/reverse-string/ReverseStringTest.cs
+++ b/exercises/reverse-string/ReverseStringTest.cs
@@ -1,4 +1,4 @@
-// This file was auto-generated based on version 1.1.0 of the canonical data.
+// This file was auto-generated based on version 1.2.0 of the canonical data.
 
 using Xunit;
 
@@ -33,4 +33,10 @@ public void A_palindrome()
     {
         Assert.Equal("racecar", ReverseString.Reverse("racecar"));
     }
+
+    [Fact(Skip = "Remove to run test")]
+    public void An_even_sized_word()
+    {
+        Assert.Equal("reward", ReverseString.Reverse("drawer"));
+    }
 }
\ No newline at end of file
diff --git a/exercises/yacht/YachtTest.cs b/exercises/yacht/YachtTest.cs
index ffeb4dcf3a..80ec8a1490 100644
--- a/exercises/yacht/YachtTest.cs
+++ b/exercises/yacht/YachtTest.cs
@@ -1,4 +1,4 @@
-// This file was auto-generated based on version 1.1.0 of the canonical data.
+// This file was auto-generated based on version 1.2.0 of the canonical data.
 
 using Xunit;
 
@@ -154,6 +154,12 @@ public void Big_straight_as_little_straight()
         Assert.Equal(0, YachtGame.Score(new[] { 6, 5, 4, 3, 2 }, YachtCategory.LittleStraight));
     }
 
+    [Fact(Skip = "Remove to run test")]
+    public void No_pairs_but_not_a_big_straight()
+    {
+        Assert.Equal(0, YachtGame.Score(new[] { 6, 5, 4, 3, 1 }, YachtCategory.BigStraight));
+    }
+
     [Fact(Skip = "Remove to run test")]
     public void Choice()
     {