Npgsql.Tests.ConnectionTests.ConcurrentUse C# (CSharp) Method

        public void ConcurrentUse()
        {
            using (var conn = OpenConnection())
            using (var cmd = new NpgsqlCommand("SELECT 1", conn))
            using (cmd.ExecuteReader())
                Assert.That(() => conn.ExecuteScalar("SELECT 1"), Throws.Exception.TypeOf<InvalidOperationException>());
        }