Compiler Error CS0202
foreach requires that the return type 'type' of 'type.GetEnumerator()' must have a suitable public MoveNext method and public Current property
A GetEnumerator function, used to enable the use of foreach statements, cannot return a pointer or array; it must return an instance of a class that is able to act as an enumerator. The proper requirements to serve as an enumerator include a public Current property and a public MoveNext method.
Note
In C# 2.0, the compiler will automatically generate Current and MoveNext for you. For more information, see the code example in Generic Interfaces.
The following sample generates CS0202:
// CS0202.cs
public class C1
{
public int Current
{
get
{
return 0;
}
}
public bool MoveNext ()
{
return false;
}
public static implicit operator C1 (int c1)
{
return 0;
}
}
public class C2
{
public int Current
{
get
{
return 0;
}
}
public bool MoveNext ()
{
return false;
}
public C1[] GetEnumerator ()
// try the following line instead
// public C1 GetEnumerator ()
{
return null;
}
}
public class MainClass
{
public static void Main ()
{
C2 c2 = new C2();
foreach (C1 x in c2) // CS0202
{
System.Console.WriteLine(x.Current);
}
}
}
.NET feedback
.NET is an open source project. Select a link to provide feedback: