Embed simple external application in IIS - asp.net

Question

using System;
using System.Text;
using Microsoft.Web.Administration;
internal static class Sample
{
private static void Main()
{
using (ServerManager serverManager = new ServerManager())
{
Configuration config = serverManager.GetApplicationHostConfiguration();
ConfigurationSection sitesSection = config.GetSection("system.applicationHost/sites");
ConfigurationElementCollection sitesCollection = sitesSection.GetCollection();
ConfigurationElement siteElement = FindElement(sitesCollection, "site", "name", #"Contoso");
if (siteElement == null) throw new InvalidOperationException("Element not found!");
ConfigurationElementCollection siteCollection = siteElement.GetCollection();
ConfigurationElement applicationElement = siteCollection.CreateElement("application");
applicationElement["path"] = #"/ShoppingCart";
ConfigurationElementCollection applicationCollection = applicationElement.GetCollection();
ConfigurationElement virtualDirectoryElement = applicationCollection.CreateElement("virtualDirectory");
virtualDirectoryElement["path"] = #"/";
virtualDirectoryElement["physicalPath"] = #"C:\Inetpub\Contoso\ShoppingCart";
applicationCollection.Add(virtualDirectoryElement);
siteCollection.Add(applicationElement);
serverManager.CommitChanges();
}
}
private static ConfigurationElement FindElement(ConfigurationElementCollection collection, string elementTagName, params string[] keyValues)
{
foreach (ConfigurationElement element in collection)
{
if (String.Equals(element.ElementTagName, elementTagName, StringComparison.OrdinalIgnoreCase))
{
bool matches = true;
for (int i = 0; i < keyValues.Length; i += 2)
{
object o = element.GetAttributeValue(keyValues[i]);
string value = null;
if (o != null)
{
value = o.ToString();
}
if (!String.Equals(value, keyValues[i + 1], StringComparison.OrdinalIgnoreCase))
{
matches = false;
break;
}
}
if (matches)
{
return element;
}
}
}
return null;
}
}
My angular client works with IIS. All GET requests are well served by IIS.
Every http POST request should be converted to TCP request that will be sent to another PC.
Should I create an ASP.net application for this purpose ?
Can I use another architecture(but ASP.net) that will work with IIS ?
This external application has no GUI. Only simple console (which is not mandatory).
Thank you,
Zvika