changed tests and examples to use "using" for IDisposable calls

1 files changed, 21 insertions, 12 deletions

diff --git a/src/csharp/Grpc.Examples/MathExamples.cs b/src/csharp/Grpc.Examples/MathExamples.cs
index f028d582dc..d2cfbee18f 100644
--- a/src/csharp/Grpc.Examples/MathExamples.cs
+++ b/src/csharp/Grpc.Examples/MathExamples.cs
@@ -53,9 +53,11 @@ namespace math
 
         public static async Task FibExample(Math.IMathClient stub)
         {
-            var call = stub.Fib(new FibArgs.Builder { Limit = 5 }.Build());
-            List<Num> result = await call.ResponseStream.ToList();
-            Console.WriteLine("Fib Result: " + string.Join("|", result));
+            using (var call = stub.Fib(new FibArgs.Builder { Limit = 5 }.Build()))
+            {
+                List<Num> result = await call.ResponseStream.ToList();
+                Console.WriteLine("Fib Result: " + string.Join("|", result));
+            }
         }
 
         public static async Task SumExample(Math.IMathClient stub)
@@ -67,9 +69,11 @@ namespace math
                 new Num.Builder { Num_ = 3 }.Build()
             };
 
-            var call = stub.Sum();
-            await call.RequestStream.WriteAll(numbers);
-            Console.WriteLine("Sum Result: " + await call.Result);
+            using (var call = stub.Sum())
+            {
+                await call.RequestStream.WriteAll(numbers);
+                Console.WriteLine("Sum Result: " + await call.Result);
+            }
         }
 
         public static async Task DivManyExample(Math.IMathClient stub)
@@ -80,9 +84,11 @@ namespace math
                 new DivArgs.Builder { Dividend = 100, Divisor = 21 }.Build(),
                 new DivArgs.Builder { Dividend = 7, Divisor = 2 }.Build()
             };
-            var call = stub.DivMany();
-            await call.RequestStream.WriteAll(divArgsList);
-            Console.WriteLine("DivMany Result: " + string.Join("|", await call.ResponseStream.ToList()));
+            using (var call = stub.DivMany())
+            { 
+                await call.RequestStream.WriteAll(divArgsList);
+                Console.WriteLine("DivMany Result: " + string.Join("|", await call.ResponseStream.ToList()));
+            }
         }
 
         public static async Task DependendRequestsExample(Math.IMathClient stub)
@@ -94,9 +100,12 @@ namespace math
                 new Num.Builder { Num_ = 3 }.Build()
             };
 
-            var sumCall = stub.Sum();
-            await sumCall.RequestStream.WriteAll(numbers);
-            Num sum = await sumCall.Result;
+            Num sum;
+            using (var sumCall = stub.Sum())
+            {
+                await sumCall.RequestStream.WriteAll(numbers);
+                sum = await sumCall.Result;
+            }
 
             DivReply result = await stub.DivAsync(new DivArgs.Builder { Dividend = sum.Num_, Divisor = numbers.Count }.Build());
             Console.WriteLine("Avg Result: " + result);