C# Online Compiler | .NET Fiddle

using System;

public class Program
{
	public static void Main()
	{
		int i = -2147483648;
		int j = 2147483647;
		//int k = 4294967294; // compile-time error: Cannot implicitly convert type 'uint' to 'int'.
		
		uint ui1 = 4294967295;
		//uint ui2 = -1; // compile-time error
		Console.WriteLine(Int32.MaxValue);
		Console.WriteLine(Int32.MinValue);
		Console.WriteLine(UInt32.MaxValue);
		Console.WriteLine(UInt32.MinValue);
	}
}

 
using System;
​
public class Program
{
    public static void Main()
    {
        int i = -2147483648;
        int j = 2147483647;
        //int k = 4294967294; // compile-time error: Cannot implicitly convert type 'uint' to 'int'.
        
        uint ui1 = 4294967295;
        //uint ui2 = -1; // compile-time error
        Console.WriteLine(Int32.MaxValue);
        Console.WriteLine(Int32.MinValue);
        Console.WriteLine(UInt32.MaxValue);
        Console.WriteLine(UInt32.MinValue);
    }
}

Compilation error (line 26, col 13): The name 'Console' does not exist in the current context
Compilation error (line 27, col 28): The name 'Console' does not exist in the current context
Compilation error (line 28, col 13): The name 'Console' does not exist in the current context
Compilation error (line 29, col 29): The name 'Console' does not exist in the current context
Compilation error (line 47, col 13): The name 'Console' does not exist in the current context
Compilation error (line 51, col 13): The name 'Console' does not exist in the current context