Here are some useful tips for getting started with .NET on Tanzu Application Service. Search with words like “steeltoe”, “dotnet”, “kerberos”, or “buildpack” to find helpful .NET things.
Another area of interest is the Steeltoe Incubator. This is a collection of Steeltoe related projects, made by the community.
Steps to follow to push a ASP.NET application to PCF
Steps to follow when your ASP.NET application doesn't work
Along with the many recipes in this cookbook, there are also full projects available in the Cloud Foundry Community repo to help you to migrate apps to PCF more easily.
.NET Core CLI Extension - For creating new extension buildpacks
Buildpack Staging Simulator - For debugging app droplets locally
Windows Services Final Buildpack - For bootstrapping Windows Services without converting to a console app (used instead of the HWC buildpack)
Web Config Transform Extension Buildpack - For automating cloud-friendly configuration changes

Using IWA Kerberos with WCF - This group of tools includes a Route Service, Route Service Extension Buildpacks for Ingress and Egress scenarios, and a supporting Nuget package.