How Can I Get the Current Line Number in .NET?

Getting the Current Line Number in .NET

Determining the current line number in your code can be useful for debugging or displaying error messages. Here's how you can achieve it:

In .NET 4.5 / C# 5, you can use the compiler's built-in functionality. Define a utility method that leverages the new caller attributes:

using System.Runtime.CompilerServices;

static void SomeMethodSomewhere()
{
    ShowMessage("Boo");
}
...
static void ShowMessage(string message,
    [CallerLineNumber] int lineNumber = 0,
    [CallerMemberName] string caller = null)
{
     MessageBox.Show(message + " at line " + lineNumber + " (" + caller + ")");
}

When you call SomeMethodSomewhere(), it will display:

Boo at line 39 (SomeMethodSomewhere)

In addition, you can use [CallerFilePath] to retrieve the path of the original code file.

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