transaction example

This is a very simple example showing how to use TransactionManager. This example shows how to begin a transaction, commit a transaction, and rollback a transaction while showing exception handling. We commit two keys and rollback adding a third key and destroying an existing key while showing how to handle exceptions.

Prerequisites

An installation of Apache Geode.
Apache Geode Native, built and installed.
Apache Geode Native examples, built and installed.

Running

From a command shell, set the current directory to the transaction directory in your example workspace.
```
$ cd workspace/examples/build/dotnet/transaction
```
Run the startserver.ps1 script to start the Geode cluster with authentication and create a region.
For Windows cmd:
```
$ powershell.exe -File startserver.ps1
```
For Windows Powershell:
```
$ startserver.ps1
```

Execute dotnet-transaction.exe, expect the following output:

Created cache
Created region 'exampleRegion'
Rolled back transaction - retrying(4)
Rolled back transaction - retrying(3)
Rolled back transaction - retrying(2)
Committed transaction - exiting

Run the stopserver.ps1 script to gracefully shutdown the Geode cluster.
For Windows cmd:
```
$ powershell.exe -File stopserver.ps1
```
For Windows Powershell:
```
$ stopserver.ps1
```