Check If Database connection is available or not

public static bool GetConnectionState()
{
	try
	{
		using (SqlConnection con = new SqlConnection(YOUR_SQLCONNECTION_STRING) //Set your connection string here
		{
		      con.Open();
		      return (con.State == ConnectionState.Open);
		}
	}
	catch (SqlException)
	{
		return false;
	}
	catch (Exception ex)
	{
		return false;
	}
}