C# Blackjack prototype
Just a few notes so you can improve your code:

int sum1 = draw1 + draw2;

if (sum1 == 21) //Blackjack Ending
{
  Console.WriteLine(&quot;Congratulations! You got &quot; + sum1 + &quot;!&quot;);
}


This won't ever be true, because

you have nowhere in the cards an ace meaning having a possible value of eleven.
the maxValue in Random.Next(int minValue, int maxValue) is the exclusive upper bound of the random number returned.

In void drawChoice(bool contChoice) the method argument contChoice is a value type. You can't modify it like you think. After leaving the method regardless wether the user typed y or n the value of cont1 is still false. You should change the method signature to have no arguments but to return a bool.

if (cont1 == true)  


because cont1 already is a bool you won't need to compare it with a bool. You can simply use it as condition like if (cont1) and if  you would need to check wether a bool variable is false you would use if (!cont1).