PLEDGE001: Contract call is not at the top of the method

Severity: Error. Fix: Move contract to the top of the method.

The generator reads Pledge.Requires, Pledge.Ensures and Pledge.EnsuresOnThrow from the top of a method body and stops at the first statement that is not one of them. A contract after that point, or nested inside another statement, is never lifted into a check. Because Pledge.* calls compile away in every build, it would also never run as plain code: it would simply vanish.

public decimal Withdraw(decimal amount)
{
    var fee = Fee(amount);
    Pledge.Requires(amount > 0);   // PLEDGE001: after a non-contract statement
    ...
}

Move the contract above the first ordinary statement. The code fix does this when the contract does not read a local declared above it; a contract that needs such a local has to be rewritten in terms of parameters and members, since it is evaluated before the body runs.

Contracts in places the generator cannot intercept at all (constructors, property accessors, lambdas) are reported as PLEDGE009 instead.