/// <summary>
/// Executes a sql query and returns the value of first column of the first row.
/// </summary>
/// <typeparam name="T">Type of return value.</typeparam>
/// <param name="query">Query sql to execute on database.</param>
/// <param name="queryParams">Object or array that contains parameters to bind in query.</param>
/// <returns>The value of first column of the first row of the type specified on T.</returns>
public T GetValue <T>(string query, params object[] queryParams)
{
var result = GetValue(query, queryParams);
return(DataReader.CastTo <T>(result));
}