查看元数据我发现了这个函数:(在“System.Convert”类中)
//
// Summary:
// Calling this method always throws System.InvalidCastException.
//
// Parameters:
// value:
// The date and time value to convert.
//
// Returns:
// This conversion is not supported. No value is returned.
//
// Exceptions:
// System.InvalidCastException:
// This conversion is not supported.
public static bool ToBoolean(DateTime value);
为什么微软这样做?