C# Online Compiler | .NET Fiddle

using System;

public class Program
{
	public static void Main()
	{
		// Logical NOT, !
		bool result = true;
		if (!result)
		{
			Console.WriteLine("result is not true");
		}
		else
		{
			Console.WriteLine("result is not false");
		}

		// AND, &&
		int m = 9;
		int n = 7;
		int p = 5;
		if (m >= n && m >= p)
		{
			Console.WriteLine("Nothing is larger than m.");
		}

		// OR, ||
		if (m > n || m > p)
		{
			Console.WriteLine("m isn't the smallest.");
		}

		// AND and NOT
		if (m >= n && !(p > m))
		{
			Console.WriteLine("Nothing is larger than m.");
		}

		// NOT and OR
		m = 4;
		if (!(m >= n || m >= p))
		{
			Console.WriteLine("Now m is the smallest.");
		}
	}
}

 
using System;
​
public class Program
{
    public static void Main()
    {
        // Logical NOT, !
        bool result = true;
        if (!result)
        {
            Console.WriteLine("result is not true");
        }
        else
        {
            Console.WriteLine("result is not false");
        }
​
        // AND, &&
        int m = 9;
        int n = 7;
        int p = 5;
        if (m >= n && m >= p)
        {
            Console.WriteLine("Nothing is larger than m.");