What is C# and operator?

class LogocalAndOperator
{
    static void Main()
    {
        bool a = false;
        bool b = false;
        System.Console.WriteLine("a = false and b = false");
        if(a&&b)
        {
          System.Console.WriteLine("True");
        }
        else
        {
          System.Console.WriteLine("False");
        }
        // Now we will assign b to be True
        // if we hadn't changed b to True and had rather
        //changed a to true result would be saME 
        b = true;
        System.Console.WriteLine("a = false and b = true or a = true and b = false");
        if(a&&b)
        {
          System.Console.WriteLine("True");
        }
        else
        {
          System.Console.WriteLine("False");
        }
        //Now we can assign a to be true
        a = true;
        System.Console.WriteLine("a = true and b = true");
        if(a&&b)
        {
          System.Console.WriteLine("True");
        }
        else
        {
          System.Console.WriteLine("False");
        }
    }
}