Fix Error - Non-invocable member 'System.Configuration.ConfigurationManager.ConnectionStrings' cannot be used like a method

Fix Error - Non-invocable member 'System.Configuration.ConfigurationManager.ConnectionStrings' cannot be used like a method

Silahkan Perbaiki kode berikut ini:
System.Configuration.ConfigurationManager.ConnectionStrings("DefaultConnection").ToString();

Atau ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString

Menjadi:

System.Configuration.ConfigurationManager.ConnectionStrings["DefaultConnection"].ToString();

Atau

ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString