Entity framework calls Max on null on records - Entity Framework calling Max on null on records

problem ：

When calling Max() on an IQueryable and there are zero records I get the following exception. stay IQueryable On the call Max() And recorded as zero , I received the following exception .

The cast to value type 'Int32' failed because the materialized value is null. Convert to value type 'Int32' Failure , Because the materialized value is null.Either the result type's generic parameter or the query must use a nullable type. Generic parameters or queries of result types must use nullable types .

var version = ctx.Entries    .Where(e => e.Competition.CompetitionId == storeCompetition.CompetitionId)    .Max(e => e.Version);

Now I understand why this happens my question is how is the best way to do this if the table can be empty. Now I understand why this happened , My question is if the table can be empty , The best way is how to do this .The code below works and solves this problem, but its very ugly is there no MaxOrDefault() concept? The following code is effective and solves this problem , But it's very ugly , No, MaxOrDefault() Concept ？

int? version = ctx.Entries    .Where(e => e.Competition.CompetitionId == storeCompetition.CompetitionId)    .Select(e => (int?)e.Version)    .Max();

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Solution ：

Reference resources ： https://stackoom.com/en/question/Djlc