SqlAsFile - http://diegogiacomelli.com.br/sqlasfile

change-template.cs

var projectNamespace = "Sample.Data";

cte.sql

--<cte>
WITH LastMessages(ContactId, Id, NotRead)
AS (	
)
--</cte>

install-package.sh

install-package SqlAsFile

test-args.sql

--<test-args>
DECLARE @name VARCHAR(100) = 'test';
DECLARE @surname VARCHAR(200) = NULL;
--</test-args>

usage.cs

// Using the SQL inside of the file SampleSql2.sql on the folder 
// SampleData\Data\SampleNamespace1\SampleSubNamespace1.
using SampleData.Data.SampleNamespace1.SampleSubNamespace1;
...
var rows = connection.Query(Sql.SampleSql2).AsList();