Add C# StepFunctions Job Poller

csharp/stepfunctions-job-poller/.gitignore

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csharp/stepfunctions-job-poller/README.md

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+
+# Stepfunctions Job Poller
+<!--BEGIN STABILITY BANNER-->
+---
+
+![Stability: Experimental](https://img.shields.io/badge/stability-Experimental-important.svg?style=for-the-badge)
+
+> **This is an experimental example. It may not build out of the box**
+>
+> This examples does is built on Construct Libraries marked "Experimental" and may not be updated for latest breaking changes.
+>
+> If build is unsuccessful, please create an [issue](https://github.com/aws-samples/aws-cdk-examples/issues/new) so that we may debug the problem 
+
+---
+<!--END STABILITY BANNER-->
+
+This example creates a basic Stepfunction workflow that starts a task and then listens at regular intervals for completion, then reports completion and status.
+
+## Build
+
+To build this app, you need to be in this example's root folder. Then run the following:
+```bash
+dotnet build src
+cdk deploy StepfunctionsJobPollerStack
+```
+
+Enjoy!

csharp/stepfunctions-job-poller/cdk.json

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+{
+  "app": "dotnet run -p src/StepfunctionsJobPoller/StepfunctionsJobPoller.csproj"
+}