Expression Tree Tutorial OrElse Expression

You can build an expression tree using Expression.OrElse method which contains a conditional OR operation that evaluates the second operand only if the first operand evaluates to false. For example, you have the following code.

bool value = false || true;
Console.WriteLine(value);

Here is the code that is required to build the same functionality using expression tree.

Expression greaterThanExpr = Expression.OrElse(
    Expression.Constant(false),
    Expression.Constant(true)
);

Console.WriteLine(Expression.Lambda<Func<bool>>(greaterThanExpr).Compile()());

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