New in .NET 10.0 [15]: Program class and Main() method in file-based apps
File-based apps can optionally have Top-Level Statements or a classic .NET entry point.
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1 min. read
By
- Dr. Holger Schwichtenberg
A file-based app can use the Top-Level Statements introduced in C# 9.0 (as part of .NET 5.0). This will be the standard case where execution of the file begins with the first line:
Console.WriteLine(System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription);
Console.WriteLine($"Kompilierungsmodus: {(System.Runtime.CompilerServices.RuntimeFeature.IsDynamicCodeSupported ? "JIT" : "AOT")}");
Starting the file-based app with Top-Level Statement (Fig. 1)
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In addition to using Top-Level Statements, the classic style with class Program and Main() method is also possible in file-based apps:
class Program
{
static void Main(string[] args)
{
Console.WriteLine(System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription);
Console.WriteLine($"Kompilierungsmodus: {(System.Runtime.CompilerServices.RuntimeFeature.IsDynamicCodeSupported ? "JIT" : "AOT")}");
}
}
The file-based app can also be started with the Main() method in the Program class (Fig. 2).
(olb)
