Insert Into con variable en SQL server

[Peterpay]

SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrin gs["SERVER"].ConnectionString);
connection.Open();
SqlCommand update = new SqlCommand("update tbl_client set colorschema=@colorSchema where id=@clientId ", connection);
SqlParameter parameterSchema = new SqlParameter("@colorSchema", schema);
SqlParameter parameterClient = new SqlParameter("@clientId", clientId);
update.Parameters.Add(parameterSchema);
update.Parameters.Add(parameterClient);
int result=update.ExecuteNonQuery();

algo asi