Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All
Expand Minimize

Compiler Error CS0840

'Property name' must declare a body because it is not marked abstract or extern. Automatically implemented properties must define both get and set accessors.

Unless a regular property is marked as abstract or extern, or is a member of a partial type, it must supply a body. Auto-implemented properties do not provide accessor bodies, but they must specify both accessors. To create a read-only auto-implemented property, make the set accessor private.

To correct this error

The following example generates CS0840:

// cs0840.cs
// Compile with /target:library
using System;
class Test
{
    public int myProp { get; } // CS0840

    // to create a read-only property
    // try the following line instead
    public int myProp2 { get; private set; }
    
}
Show:
© 2015 Microsoft