fix NullReferenceException (#335)

dotnetcore · May 5, 2019 · e8931b3 · e8931b3
1 parent fbda6e2
commit e8931b3
Showing 1 changed file with 2 additions and 7 deletions.
diff --git a/src/DotNetCore.CAP/Diagnostics/TracingHeaders.cs b/src/DotNetCore.CAP/Diagnostics/TracingHeaders.cs
@@ -9,7 +9,7 @@ namespace DotNetCore.CAP.Diagnostics
 {
     public class TracingHeaders : IEnumerable<KeyValuePair<string, string>>
     {
-        private List<KeyValuePair<string, string>> _dataStore;
+        private List<KeyValuePair<string, string>> _dataStore = new List<KeyValuePair<string, string>>();
 
         public IEnumerator<KeyValuePair<string, string>> GetEnumerator()
         {
@@ -23,11 +23,6 @@ IEnumerator IEnumerable.GetEnumerator()
 
         public void Add(string name, string value)
         {
-            if (_dataStore == null)
-            {
-                _dataStore = new List<KeyValuePair<string, string>>();
-            }
-
             _dataStore.Add(new KeyValuePair<string, string>(name, value));
         }
 
@@ -46,4 +41,4 @@ public void Cleaar()
             _dataStore?.Clear();
         }
     }
-}
+}