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Yes.Infrastructure/ViewEngine/UriTemplateVariableQueryValue.cs

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+namespace Yes.Infrastructure.ViewEngine
+{
+    internal class UriTemplateVariableQueryValue : UriTemplateQueryValue
+    {
+        private readonly string _varName;
+
+        public UriTemplateVariableQueryValue(string varName)
+            : base(UriTemplatePartType.Variable)
+        {
+            Ensure.NotNullOrEmpty(varName, "bad variable segment");
+            _varName = varName;
+        }
+        public override void Bind(string keyName, string[] values, ref int valueIndex, StringBuilder query)
+        {
+            if (valueIndex < values.Length == false) throw new Exception("Not enough values to bind");
+            if (values[valueIndex] == null)
+            {
+                valueIndex++;
+            }
+            else
+            {
+                query.AppendFormat("&{0}={1}", UrlUtility.UrlEncode(keyName, Encoding.UTF8), UrlUtility.UrlEncode(values[valueIndex++], Encoding.UTF8));
+            }
+        }
+
+        public override bool IsEquivalentTo(UriTemplateQueryValue other)
+        {
+            Ensure.NotNull(other, "why would we ever call this?");
+            //if (other == null) {
+            //	Fx.Assert("why would we ever call this?");
+            //	return false;
+            //}
+            return other.Nature == UriTemplatePartType.Variable;
+        }
+        public override void Lookup(string value, NameValueCollection boundParameters)
+        {
+            boundParameters.Add(_varName, value);
+        }
+    }
+}