run your Azure Batch job with the .NET API

#PREREQUISITES
1.An Azure account with an active subscription. (use https://azure.microsoft.com/)
2.A Batch account and a linked Azure Storage account (use https://portal.azure.com)

#SIGN IN TO AZURE ACCOUNT
1.Use https://portal.azure.com

#GET A BATCH ACCOUNT CREDENTIALS
(provide credentials for your Batch and Storage accounts)
1.Select All services AND THEN Batch accounts, and THEN create the "name" of your Batch account.
2.Select Keys to see the Batch credentials.
3.Copy the values to a text editor. (value of Batch account, URL, and Primary access key)
4.Select Storage account to see the Storage account name and keys.
5.Copy the values to a text editor. (value of Storage account name and Key1)

#DOWNLOAD THE SAMPLE
1.Use the following command to clone the sample app=
  - git clone https://github.com/Azure-Samples/batch-dotnet-quickstart.git
2.Navigate to the directory in Visual Studio(VS)=
  - BatchDotNetQuickstart.sln
3.Update the credential strings in Program.cs in VS=
  - Batch account credentials:
private const string BatchAccountName = "mybatchaccount";
private const string BatchAccountKey  = "xxxxxxxxxxxxxxxxE+yXrRvJAqT9BlXwwo1CwF+SwAYOxxxxxxxxxxxxxxxx43pXi/gdiATkvbpLRl3x14pcEQ==";
private const string BatchAccountUrl  = "https://mybatchaccount.mybatchregion.batch.azure.com";

  - Storage account credentials:
private const string StorageAccountName = "mystorageaccount";
private const string StorageAccountKey  = "xxxxxxxxxxxxxxxxy4/xxxxxxxxxxxxxxxxfwpbIC5aAWA8wDu+AFXZB827Mt9lybZB1nUcQbQiUrkPtilK5BQ==";

#BUILD AND RUN THE APP
1.See the Batch workflow in action, build and run the application in VS=
  Or run from command line using commands below in sequence=
  - dotnet build
  - dotnet run


#CREATE A POOL OF COMPUTE NODES
1.private static VirtualMachineConfiguration CreateVirtualMachineConfiguration(ImageReference imageReference)
{
    return new VirtualMachineConfiguration(imageReference: imageReference,
           nodeAgentSkuId: "batch.node.windows amd64");
}

private static ImageReference CreateImageReference()
{
    return new ImageReference(
        publisher: "MicrosoftWindowsServer", offer: "WindowsServer",
        sku: "2016-datacenter-smalldisk", version: "latest");
}

private static void CreateBatchPool(BatchClient batchClient, VirtualMachineConfiguration vmConfiguration)
{
    try
    {
        CloudPool pool = batchClient.PoolOperations.CreatePool(
            poolId: PoolId, targetDedicatedComputeNodes: PoolNodeCount,
            virtualMachineSize: PoolVMSize, virtualMachineConfiguration: vmConfiguration);
        pool.Commit();
    }
}

#CREATE A BATCH JOB
1.try
{
    CloudJob job = batchClient.JobOperations.CreateJob();
    job.Id = JobBatchId;
    job.PoolInformation = new PoolInformation { PoolId = PoolBatchId };
    job.Commit();
}

#CREATE TASKS
1.for (int i = 0; i < inputFiles.Count; i++)
{
    string taskBatchId = String.Format("Task{0}", i);
    string inputTaskFilename = inputFiles[i].FilePath;
    string taskCommandLine = String.Format("cmd /c type {0}", inputTaskFilename);

    CloudTask task = new CloudTask(taskBatchId, taskCommandLine);
    task.ResourceFiles = new List<ResourceFile> { inputFiles[i] };
    tasks.Add(task);
}
batchClient.JobOperations.AddTask(JobId, tasks);