diff --git a/QueryStringParameters.cs b/QueryStringParameters.cs
index 18c3631..211ed3b 100644
--- a/QueryStringParameters.cs
+++ b/QueryStringParameters.cs
@@ -49,6 +49,13 @@ namespace ln.http
         public bool TryGetValue(string key, out string value) => parameters.TryGetValue(key, out value);
         IEnumerator IEnumerable.GetEnumerator() => parameters.GetEnumerator();
 
+        public string GetValue(string key,string defaultValue)
+        {
+            if (!ContainsKey(key))
+                return defaultValue;
+            return parameters[key];
+        }
+
         public override string ToString()
         {
             StringBuilder stringBuilder = new StringBuilder();