WinForms - How to prompt the user for a file | MAKOLYTE
The OpenFileDialog - The complete WPF tutorial
Allow user to select file name (Open file name picker dialog) - HowTo - UI.Vision RPA Software Forum | Discuss RPA Automation, Selenium IDE and OCR API Text Recognition
How to Upload a CSV file in C# Windows Form Application
Visual Studio OpenFileDialog Filter | Tech and Programming Tips
How to Add Custom File Types to Excel Open File Dialog | SumTips