To specify a long type, use either the l or L suffix. For example: : long box unbox « Data Type « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Data Type
3. long box unbox

using System;

public class MainClass{
    public static void Main() {
        long lVal = 0x7FFFFFL;            // Long value specified as hex constant
        Console.WriteLine(lVal);

    }
}