Filter with regex MongoDB C# driver

Question

I am trying to match the fields of originalEmail with a mail address like liron@gmail.com, but no matter, case sensitive means to also find LirOn@gmail.com fiel

Answer 1

You can use Builders.Filter.Regex.

public async Task<Entity> GetEntityIdByOriginalEmail(string originalEmail)
{
    var collection = GetCollection();
    var filter = Builders<Entity>.Filter.Regex("x", new BsonRegularExpression(originalEmail, "i"));
    return await collection.Find(filter).FirstOrDefaultAsync();
}