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

        public void ParametersGetName()
        {
            var command = new NpgsqlCommand();

            // Add parameters.
            command.Parameters.Add(new NpgsqlParameter(":Parameter1", DbType.Boolean));
            command.Parameters.Add(new NpgsqlParameter(":Parameter2", DbType.Int32));
            command.Parameters.Add(new NpgsqlParameter(":Parameter3", DbType.DateTime));
            command.Parameters.Add(new NpgsqlParameter("Parameter4", DbType.DateTime));

            var idbPrmtr = command.Parameters["Parameter1"];
            Assert.IsNotNull(idbPrmtr);
            command.Parameters[0].Value = 1;

            // Get by indexers.

            Assert.AreEqual(":Parameter1", command.Parameters[":Parameter1"].ParameterName);
            Assert.AreEqual(":Parameter2", command.Parameters[":Parameter2"].ParameterName);
            Assert.AreEqual(":Parameter3", command.Parameters[":Parameter3"].ParameterName);
            //Assert.AreEqual(":Parameter4", command.Parameters["Parameter4"].ParameterName); //Should this work?

            Assert.AreEqual(":Parameter1", command.Parameters[0].ParameterName);
            Assert.AreEqual(":Parameter2", command.Parameters[1].ParameterName);
            Assert.AreEqual(":Parameter3", command.Parameters[2].ParameterName);
            Assert.AreEqual("Parameter4", command.Parameters[3].ParameterName);
        }