CSHARP-2492: Update Transactions Retry Example 3 to include read preference.

DmitryLukyanov · DmitryLukyanov · commit 2f936cf17345 · 2019-11-12T00:32:49.000+03:00
diff --git a/tests/MongoDB.Driver.Examples/TransactionExamplesForDocs/RetryExample3.cs b/tests/MongoDB.Driver.Examples/TransactionExamplesForDocs/RetryExample3.cs
@@ -81,7 +81,8 @@ public void UpdateEmployeeInfo(IMongoClient client, IClientSessionHandle session
 
             session.StartTransaction(new TransactionOptions(
                 readConcern: ReadConcern.Snapshot,
-                writeConcern: WriteConcern.WMajority));
+                writeConcern: WriteConcern.WMajority,
+                readPreference: ReadPreference.Primary));
 
             try
             {

Original file line number	Diff line number	Diff line change
`@@ -81,7 +81,8 @@ public void UpdateEmployeeInfo(IMongoClient client, IClientSessionHandle session`
`81`	`81`
`82`	`82`	`session.StartTransaction(new TransactionOptions(`
`83`	`83`	`readConcern: ReadConcern.Snapshot,`
`84`		`- writeConcern: WriteConcern.WMajority));`
	`84`	`+ writeConcern: WriteConcern.WMajority,`
	`85`	`+ readPreference: ReadPreference.Primary));`
`85`	`86`
`86`	`87`	`try`
`87`	`88`	`{`