diff --git a/src/csharp/Grpc.Core.Tests/Internal/AsyncCallTest.cs b/src/csharp/Grpc.Core.Tests/Internal/AsyncCallTest.cs
index 74b104e5a4b64612a5951853770808fa481784b8..98e27a17a1d417ba2b319ed4cbed4d3df844e1cb 100644
--- a/src/csharp/Grpc.Core.Tests/Internal/AsyncCallTest.cs
+++ b/src/csharp/Grpc.Core.Tests/Internal/AsyncCallTest.cs
@@ -210,6 +210,7 @@ namespace Grpc.Core.Internal.Tests
                 new Metadata());
 
             AssertUnaryResponseSuccess(asyncCall, fakeCall, resultTask);
+
             var writeTask = requestStream.WriteAsync("request1");
             var ex = Assert.ThrowsAsync<RpcException>(async () => await writeTask);
             Assert.AreEqual(Status.DefaultSuccess, ex.Status);
diff --git a/src/csharp/Grpc.Core/Channel.cs b/src/csharp/Grpc.Core/Channel.cs
index e485f0807cb865ab5140db1c0afd4efb3501f33a..4f29c35b3212a8fc4ac8f089e87da05ee095e41e 100644
--- a/src/csharp/Grpc.Core/Channel.cs
+++ b/src/csharp/Grpc.Core/Channel.cs
@@ -31,7 +31,6 @@
 
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;