Build Your Own GPT from Scratch with C# and TorchSharp (CPU-Only!)

A comprehensive tutorial demonstrates building a GPT-style language model from scratch using C# and TorchSharp, running entirely on CPU. The guide walks through creating a character-level transformer with multi-head self-attention, feed-forward networks, and positional embeddings, achieving 92.5% accuracy with a 4-layer model trained on Shakespeare text. The tutorial shows C# developers can enter AI development and understand how modern language models work, including practical tips for hyperparameter tuning, training optimization, and generation techniques like temperature scaling and nucleus sampling.