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Categories / C# Book / 01 Language Basics

 

0229 Assert

Assert calls Fail method if the condition doesn't meet. using System; using System.Diagnostics; using System.IO; class Program { static void Main() { Trace.Listeners.Add(new TextWriterTraceListener("trace.txt")); Trace.Assert(File.Exists("data.txt"), "File data.txt does not exist!"); } }