Npgsql.Tests.CommandTests.PrepareRequiresParamTypesSet C# (CSharp) Method

        public void PrepareRequiresParamTypesSet()
        {
            using (var conn = OpenConnection())
            using (var cmd = new NpgsqlCommand("SELECT @p", conn))
            {
                var p = new NpgsqlParameter("p", 8);
                cmd.Parameters.Add(p);
                Assert.That(() => cmd.Prepare(), Throws.InvalidOperationException);
            }
        }