C# Error CS0720 – ‘{0}’: cannot declare indexers in a static class

C# Error

CS0720 – ‘{0}’: cannot declare indexers in a static class

Reason for the Error & Solution

‘static class’: cannot declare indexers in a static class

Indexers are not meaningful in static classes, since they can only be used with instances, and it is not possible to create instances of a static type.

Example

The following sample generates CS0720:

// CS0720.cs  
  
public static class Test  
{  
    public int this[int index]  // CS0720  
    {  
        get { return 1; }  
        set {}  
    }  
  
    static void Main() {}  
}