C# Online Compiler | .NET Fiddle

<no name> by Anonymous

using System;
					
public class Program
{
	    static void Main(string[] args)
    {
        int a = 5;
        int b = 6;
        Console.WriteLine(a +" "+ b);
        swap(ref a, ref b);
        Console.WriteLine(a + " " + b);
    }
    static void swap(ref int x, ref int y)
    {
        int temp = x;
        x = y;
        y = temp;

    }
}

​x
 
using System;
                    
public class Program
{
        static void Main(string[] args)
    {
        int a = 5;
        int b = 6;
        Console.WriteLine(a +" "+ b);
        swap(ref a, ref b);
        Console.WriteLine(a + " " + b);
    }
    static void swap(ref int x, ref int y)
    {
        int temp = x;
        x = y;
        y = temp;
​
    }
}
​

Run-time exception (line 8): Request for the permission of type 'System.Security.Permissions.UIPermission, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

Stack Trace:

[System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.UIPermission, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.]
   at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet)
   at System.Security.CodeAccessPermission.Demand()
   at System.Console.set_BackgroundColor(ConsoleColor value)
   at HelloWorld.Main() :line 8

Last Run:	5:42:32 pm
Compile:	0.094s
Execute:	0s
Memory:	237.27kb
CPU:	0.016s

View IL Code