Fine-Tuning Pre-Trained BERT Transformers to ONNX for Predictions in C#

Published at : 23 Dec 2025

Apart from Microsoft's official ML.NET APIs, we can use different A.I. models leveraging the ONNX runtime. Now, I guide you through re-training such a model on our custom dataset to then use it as ONNX model in C#.

00:00 Intro
00:42 Train Tokenizer
10:40 Tokenize & Label Dataset
13:20 Train Model
19:40 Evaluate & Save Model
21:55 Export ONNX Model
23:20 Use Model in C# .NET
34:15 Next Steps
34:40 Outro


#finetuning #robbert #inference #multilingual #llm #rag #semanticsearch #embeddings #nlu #vectordatabase #transformers #similarity #vectors #embeddings #deeplearning #linkedin #datamining #webscraping #recommendationsystems #ecommerce #collaborativefiltering #unsupervisedlearning #clustering #dimensionalityreduction #classification #logistic #regression #linear #model #machinelearning #basics #theory #simplification #artificialintelligence #mathematics #statistics #dotnet #mlnet #modelbuilder #predictions #features #vector #tensor #data #datascience #dataanalytics #datastructures #csharp #csharptutorial #visualstudio #usecase #customeracquisition #forecasting #priceprediction #vscode #codefirst #mlapi #api #nuget #computervision #nlp #stateoftheart