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Elasticsearch.Net and NEST: the .NET clients [1.x] » Search » Highlighting
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Highlightingedit

Using highlighting you can return the relevant parts of a field and using highlighted markers, indicate why a document matched

var result = this._client.Search<ElasticSearchProject>(s => s
    .From(0)
    .Size(10)
    .Query(q => q
        .QueryString(qs => qs
            .OnField(e => e.Content)
            .Query("null or null*")
        )
    )
    .Highlight(h => h
        .PreTags("<b>")
        .PostTags("</b>")
        .OnFields(f => f
            .OnField(e => e.Content)
            .PreTags("<em>")
            .PostTags("</em>")
        )
    )
);

Please take note that this won’t alter the contents of the results .Documents but the results will have a separate bucket that contains each highlight result(s) for each hit on result.Highlights.

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