OpenFileDialog c#

C# open file dialog

OpenFileDialog dialog = new OpenFileDialog();
if (DialogResult.OK == dialog.ShowDialog()) 
{
    string path = dialog.FileName;
}

OpenFileDialog c#

OpenFileDialog fileDialog= new OpenFileDialog(); 
fileDialog.DefaultExt = ".txt"; // Required file extension 
fileDialog.Filter = "Text documents (.txt)|*.txt"; // Optional file extensions

fileDialog.ShowDialog();

Source: stackoverflow.com

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