--b: decrease before run the instruction
b--: decrease after running the instruction

using System;

public class Program
{
public static void Main()
{
int a = 1;
int b = 2;
Console.WriteLine(a == --b && a == b++);

Console.WriteLine(a == --b || a == b++);

Console.WriteLine(a == --b && b == a++);
}
}

True
True
False

The output of line 05 is True is yes

using System;

public class Program
{
public static void Main()
{
int a = 1;
int b = 2;

if (a == --b && b == a++)
{
Console.WriteLine("true");
}
else
{
Console.WriteLine("false");
}
}
}