使用分配代理时出错？ ：语法

private delegate bool CharComparer(char a, char b);

// Case-sensitive char comparer
private static bool CharCompare(char a, char b)
{
    return (a == b);
}

// Case-insensitive char comparer
private static bool CharCompareIgnoreCase(char a, char b)
{
    return (Char.ToLower(a) == Char.ToLower(b));
}

CharComparer isEqual = (ignoreCase) ? CharCompareIgnoreCase : CharCompare;

if ... else