diff --git a/binding/c#/IP2Region/DBSearcher.cs b/binding/c#/IP2Region/DBSearcher.cs
index 80756b3..aaae79b 100644
--- a/binding/c#/IP2Region/DBSearcher.cs
+++ b/binding/c#/IP2Region/DBSearcher.cs
@@ -362,21 +362,21 @@ namespace IP2Region
         /// </summary>
         public async Task<DataBlock> MemorySearchAsync(string ip)
         {
-            return await Task.FromResult(MemorySearch(ip));
+            return Task.FromResult(MemorySearch(ip));
         }
         /// <summary>
         /// Get the region throught the ip address with b-tree search algorithm.
         /// </summary>
         public async Task<DataBlock> BtreeSearchAsync(string ip)
         {
-            return await Task.FromResult(BtreeSearch(ip));
-        }
+            return Task.FromResult(BtreeSearch(ip));
+        }
         /// <summary>
         /// Get the region throught the ip address with binary search algorithm.
         /// </summary>
         public async Task<DataBlock> BinarySearchAsync(string ip)
         {
-            return await Task.FromResult(BinarySearch(ip));
+            return Task.FromResult(BinarySearch(ip));
         }
         #endregion
 
@@ -397,4 +397,4 @@ namespace IP2Region
         }
     }
 
-}
\ No newline at end of file
+}