diff --git a/.gitignore b/.gitignore
index 5a1ed6c..b3a2e62 100644
--- a/.gitignore
+++ b/.gitignore
@@ -248,4 +248,5 @@ ModelManifest.xml
 coverage.opencover.xml
 coverage.json
 coverage.info
-output
\ No newline at end of file
+.DS_Store
+output
diff --git a/src/UriBuilder.Fluent.UnitTests/ExtensionTests.cs b/src/UriBuilder.Fluent.UnitTests/ExtensionTests.cs
index 7bcaa86..21bdda5 100644
--- a/src/UriBuilder.Fluent.UnitTests/ExtensionTests.cs
+++ b/src/UriBuilder.Fluent.UnitTests/ExtensionTests.cs
@@ -16,7 +16,7 @@ namespace FluentUriBuilder.Tests
         {
             var url = new UriBuilder("http://awesome.com")
                 .WithPathSegment(pathWithSlashes);
-            Assert.Equal("http://awesome.com/" + expectedPath, url.Uri.ToString());
+            Assert.Equal("http://awesome.com/" + expectedPath, url.ToUriString());
         }
 
         [Fact]
@@ -25,7 +25,7 @@ namespace FluentUriBuilder.Tests
             var url = new UriBuilder("http://awesome.com")
                 .WithPathSegment("yodawg")
                 .WithPathSegment("/immahslash/");
-            Assert.Equal("http://awesome.com/yodawg/immahslash/", url.Uri.ToString());
+            Assert.Equal("http://awesome.com/yodawg/immahslash/", url.ToUriString());
         }
 
         [Fact]
@@ -33,7 +33,7 @@ namespace FluentUriBuilder.Tests
         {
             var url = new UriBuilder("http://awesome.com")
                     .WithParameter("awesome", "yodawg");
-            Assert.Equal("http://awesome.com/?awesome=yodawg", url.Uri.ToString());
+            Assert.Equal("http://awesome.com/?awesome=yodawg", url.ToUriString());
         }
         [Fact]
         public void TestAddUrlParameterAsTupleList()
@@ -43,7 +43,7 @@ namespace FluentUriBuilder.Tests
                     {
                         ("awesome", "yodawg")
                     });
-            Assert.Equal("http://awesome.com/?awesome=yodawg", url.Uri.ToString());
+            Assert.Equal("http://awesome.com/?awesome=yodawg", url.ToUriString());
         }
 
         [Fact]
@@ -62,7 +62,7 @@ namespace FluentUriBuilder.Tests
         {
             var url = new UriBuilder("http://awesome.com")
                     .WithParameter("awesome", "cool", "dawg");
-            Assert.Equal("http://awesome.com/?awesome=cool,dawg", url.Uri.ToString());
+            Assert.Equal("http://awesome.com/?awesome=cool,dawg", url.ToUriString());
         }
 
         [Fact]
@@ -70,7 +70,7 @@ namespace FluentUriBuilder.Tests
         {
             var url = new UriBuilder("http://awesome.com")
                     .WithParameter("awesome", new List<int>() { 1, 2 }.Cast<object>());
-            Assert.Equal("http://awesome.com/?awesome=1,2", url.Uri.ToString());
+            Assert.Equal("http://awesome.com/?awesome=1,2", url.ToUriString());
         }
 
         [Fact]
@@ -78,7 +78,7 @@ namespace FluentUriBuilder.Tests
         {
             var url = new UriBuilder("http://awesome.com")
                     .WithParameter("awesome");
-            Assert.Equal("http://awesome.com/?awesome", url.Uri.ToString());
+            Assert.Equal("http://awesome.com/?awesome", url.ToUriString());
         }
 
         [Fact]
@@ -86,7 +86,7 @@ namespace FluentUriBuilder.Tests
         {
             var url = new UriBuilder("http://awesome.com")
                 .WithFragment("awesome", "cool", "dawg");
-            Assert.Equal("http://awesome.com/#awesome=cool,dawg", url.Uri.ToString());
+            Assert.Equal("http://awesome.com/#awesome=cool,dawg", url.ToUriString());
         }
 
         [Fact]
@@ -94,7 +94,7 @@ namespace FluentUriBuilder.Tests
         {
             var url = new UriBuilder("http://awesome.com")
                     .WithFragment("awesome", new List<int>() { 1, 2 }.Cast<object>());
-            Assert.Equal("http://awesome.com/#awesome=1,2", url.Uri.ToString());
+            Assert.Equal("http://awesome.com/#awesome=1,2", url.ToUriString());
         }
 
         [Fact]
@@ -102,7 +102,7 @@ namespace FluentUriBuilder.Tests
         {
             var url = new UriBuilder("http://awesome.com")
                     .WithFragment("awesome");
-            Assert.Equal("http://awesome.com/#awesome", url.Uri.ToString());
+            Assert.Equal("http://awesome.com/#awesome", url.ToUriString());
         }
 
         [Fact]
@@ -117,15 +117,15 @@ namespace FluentUriBuilder.Tests
         {
             var url = new UriBuilder("http://awesome.com:80")
                 .WithoutDefaultPort();
-            Assert.Equal("http://awesome.com/", url.Uri.ToString());
+            Assert.Equal("http://awesome.com/", url.ToUriString());
 
             url = new UriBuilder("http://awesome.com:443")
                 .WithoutDefaultPort();
-            Assert.Equal("http://awesome.com:443/", url.Uri.ToString());
+            Assert.Equal("http://awesome.com:443/", url.ToUriString());
 
             url = new UriBuilder("https://awesome.com:443")
                 .WithoutDefaultPort();
-            Assert.Equal("https://awesome.com/", url.Uri.ToString());
+            Assert.Equal("https://awesome.com/", url.ToUriString());
         }
 
         [Fact]
@@ -165,7 +165,7 @@ namespace FluentUriBuilder.Tests
                     .WithParameter("awesome", "yodawg")
                     .WithParameter("fun", null)
                     .WithParameter("cool", string.Empty);
-            Assert.Equal("http://awesome.com/?awesome=yodawg&fun&cool", url.Uri.ToString());
+            Assert.Equal("http://awesome.com/?awesome=yodawg&fun&cool", url.ToUriString());
         }
 
         [Fact]
@@ -175,7 +175,7 @@ namespace FluentUriBuilder.Tests
                     .WithParameter("awesome", "yodawg")
                     .WithParameter("supg", "no2")
                     .WithParameter("supgf", "no22");
-            Assert.Equal("http://awesome.com/?awesome=yodawg&supg=no2&supgf=no22", url.Uri.ToString());
+            Assert.Equal("http://awesome.com/?awesome=yodawg&supg=no2&supgf=no22", url.ToUriString());
         }
 
         [Fact]
@@ -189,7 +189,7 @@ namespace FluentUriBuilder.Tests
             };
             var url = new UriBuilder("http://awesome.com")
                     .WithParameter(dictionary);
-            Assert.Equal("http://awesome.com/?yo=dawg&troll=toll&hammer", url.Uri.ToString());
+            Assert.Equal("http://awesome.com/?yo=dawg&troll=toll&hammer", url.ToUriString());
         }
 
         [Fact]
@@ -199,7 +199,7 @@ namespace FluentUriBuilder.Tests
                 .WithFragment("awesome", "yodawg")
                 .WithFragment("fun", null)
                 .WithFragment("cool", string.Empty);
-            Assert.Equal("http://awesome.com/#awesome=yodawg&fun&cool", url.Uri.ToString());
+            Assert.Equal("http://awesome.com/#awesome=yodawg&fun&cool", url.ToUriString());
         }
 
         [Fact]
@@ -209,7 +209,7 @@ namespace FluentUriBuilder.Tests
                 .WithFragment("awesome", "yodawg")
                 .WithFragment("supg", "no2")
                 .WithFragment("supgf", "no22");
-            Assert.Equal("http://awesome.com/#awesome=yodawg&supg=no2&supgf=no22", url.Uri.ToString());
+            Assert.Equal("http://awesome.com/#awesome=yodawg&supg=no2&supgf=no22", url.ToUriString());
         }
 
         [Fact]
@@ -223,7 +223,7 @@ namespace FluentUriBuilder.Tests
             };
             var url = new UriBuilder("http://awesome.com")
                 .WithFragment(dictionary);
-            Assert.Equal("http://awesome.com/#yo=dawg&troll=toll&hammer", url.Uri.ToString());
+            Assert.Equal("http://awesome.com/#yo=dawg&troll=toll&hammer", url.ToUriString());
         }
 
         [Fact]
@@ -231,15 +231,8 @@ namespace FluentUriBuilder.Tests
         {
             var url = new UriBuilder("http://awesome.com")
                     .WithParameter("yo", "dawg<");
-            Assert.Equal("http://awesome.com/?yo=dawg%3C", url.ToEscapeString());
+            Assert.Equal("http://awesome.com/?yo=dawg<", url.ToUriString());
         }
 
-        [Fact]
-        public void TestToEscapedDataString()
-        {
-            var url = new UriBuilder("http://awesome.com")
-                    .WithParameter("yo", "dawg<");
-            Assert.Equal("http%3A%2F%2Fawesome.com%2F%3Fyo%3Ddawg%3C", url.ToEscapeDataString());
-        }
     }
 }
\ No newline at end of file
diff --git a/src/UriBuilder.Fluent/TerribleDevUriExtensions.cs b/src/UriBuilder.Fluent/TerribleDevUriExtensions.cs
index f7e65d9..ab2687e 100644
--- a/src/UriBuilder.Fluent/TerribleDevUriExtensions.cs
+++ b/src/UriBuilder.Fluent/TerribleDevUriExtensions.cs
@@ -1,4 +1,7 @@
 using System.Collections.Generic;
+using System.Data.SqlTypes;
+using System.IO;
+using System.Linq;
 using System.Text;
 
 namespace System
@@ -266,24 +269,38 @@ namespace System
         /// <returns></returns>
         public static string ToEscapeDataString(this UriBuilder bld) => Uri.EscapeDataString(bld.Uri.ToString());
 
+        /// <summary>
+        /// Returns the Uri string
+        /// </summary>
+        /// <param name="bld"></param>
+        /// <exception cref="ArgumentNullException"></exception>
+        /// <returns></returns>
+        public static string ToUriString(this UriBuilder bld) => bld.Uri.ToString();
+
         /// <summary>
         /// Appends x-www-form-urlencoded key and valuesEnum into initialValue.
         /// </summary>
         /// <exception cref="ArgumentNullException"></exception>
         private static string AppendKeyValue(this string intitialValue, string key, IEnumerable<object> valuesEnum)
         {
-            var sb = new StringBuilder($"{intitialValue}{key}");
-            var validValueHit = false;
-            foreach (var value in valuesEnum)
+            var encodedKey = Uri.EscapeDataString(key);
+
+            var sb = new StringBuilder($"{intitialValue}{encodedKey}");
+
+            var Values = (
+                from x in valuesEnum
+                let v = x?.ToString()
+                where !string.IsNullOrWhiteSpace(v)
+                select Uri.EscapeDataString(v)
+                ).ToArray();
+
+            if (Values.Length > 0)
             {
-                var toSValue = value?.ToString();
-                if (string.IsNullOrWhiteSpace(toSValue)) continue;
-                // we can't just have an = sign since its valid to have query string paramters with no value;
-                if (!validValueHit) toSValue = "=" + value;
-                validValueHit = true;
-                sb.Append($"{toSValue},");
+                sb.Append("=");
+                sb.Append(string.Join(",", Values));
             }
-            return sb.ToString().TrimEnd(',');
+
+            return sb.ToString();
         }
     }
 }
\ No newline at end of file