Error CS1579 Foreach statement cannot operate on variables of type ‘Student’ because ‘Student’ does derece contain a public instance or extension definition for ‘GetEnumerator’ In this example, members of these interfaces are not explicitly called, but they are implemented to support the use of foreach (for each in Visual Basic) https://knoxdrftg.tnpwiki.com/6123425/5_temel_unsurları_için_c_ienumerator_neden_kullanmalıyız