cs0168.md

description	title	ms.date	f1_keywords	helpviewer_keywords	ms.assetid
Compiler Warning (level 3) CS0168	Compiler Warning (level 3) CS0168	12/21/2016	CS0168	CS0168	6f5b7fe3-1e91-462f-8a73-b931327ab3f5

Compiler Warning (level 3) CS0168

The variable 'var' is declared but never used

The compiler issues a level-three warning when you declare a variable, but do not use it.

The following sample generates a CS0168 warning:

// CS0168.cs  
// compile with: /W:3  
public class clx
{
    public int i;
}

public class clz
{
    public static void Main() {
        clx a; // CS0168, the variable 'a' is declared but never used
        // try the following line instead
        // clx a = new clx();  // this does not generate a warning because the clx constructor must execute.
    }
}