c# Nullable to YQL Option

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Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
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What is the current behavior?

Now there is no convenient way to convert the nullable type to YdbValue(YQL Optional)
One of the available options looks like this:

value.HasValue
    ? YdbValue.MakeOptional(MakeUtf8(value))
    : YdbValue.MakeEmptyOptional(YdbTypeId.Utf8));

but it takes up a lot of space and allows for errors

What is the new behavior?

To do the same thing you can use one of the options:

YdbValue.MakeOptionalUtf8(value);
// or
(YdbValue)value;

Other information