Update ObjectDictionary.cs

Author: mythz

src/ServiceStack.Text/ObjectDictionary.cs

@@ -29,8 +29,6 @@ public StringDictionary(int capacity, IEqualityComparer<string> comparer) : base
         public StringDictionary(IDictionary<string, string> dictionary) : base(dictionary) { }
         public StringDictionary(IDictionary<string, string> dictionary, IEqualityComparer<string> comparer) : base(dictionary, comparer) { }
         protected StringDictionary(SerializationInfo info, StreamingContext context) : base(info, context) { }
-        
-        
     }
 
     /// <summary>
@@ -41,6 +39,9 @@ public class KeyValuePairs : List<KeyValuePair<string, object>>
         public KeyValuePairs() { }
         public KeyValuePairs(int capacity) : base(capacity) { }
         public KeyValuePairs(IEnumerable<KeyValuePair<string, object>> collection) : base(collection) { }
+        
+        public static KeyValuePair<string,object> Create(string key, object value) => 
+            new KeyValuePair<string, object>(key, value);
     }
 
     /// <summary>
@@ -52,7 +53,7 @@ public KeyValueStrings() { }
         public KeyValueStrings(int capacity) : base(capacity) { }
         public KeyValueStrings(IEnumerable<KeyValuePair<string, string>> collection) : base(collection) { }
 
-        public static KeyValuePair<string,object> Create(string key, object value) => 
-            new KeyValuePair<string, object>(key, value);
+        public static KeyValuePair<string,string> Create(string key, string value) => 
+            new KeyValuePair<string,string>(key, value);
     }
 }