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Useful wrapper class to override the Object.ToString method

, 3 Oct 2011 CPOL
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A useful wrapper class to override the Object.ToString method.

This class can be useful for when you want to override the Object.ToString method on a type you don't have access to edit.

public class ToStringWrapper<T>
    private readonly T _wrappedObject;
    private readonly Func<T, string> _toStringFunction;
public T WrappedObject
    get { return _wrappedObject; }
public ToStringWrapper(T wrappedObject, Func&lt;T, string&gt; toStringFunction)
    this._wrappedObject = wrappedObject;
    this._toStringFunction = toStringFunction;
public override string ToString()
    return _toStringFunction(_wrappedObject);


Sample usage: Don't have access to edit the Person type and you want the Name property's value to be returned in the ToString method.

public sealed class Person
    public string Name { get; set; }
class Program
    static void Main(string[] args)
        // Person type not wrapped.  Type will be returned in ToString method
        var person = new Person { Name = "TestName" };
    // Person type wrapped with ToStringWrapper&lt;T&gt; class and supplying
    // a function that will return the Person class's Name property value.
    var personWrapper = new ToStringWrapper&lt;Person&gt;(person, i =&gt; i.Name);



This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


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Comments and Discussions

GeneralReason for my vote of 5 Also usefull in the debugger :) PinmemberEddy Vluggen13-Sep-11 14:14 
GeneralRe: I think DebuggerDisplay and DebuggerTypeProxy attributes are... Pinmembermoozzyk10-Oct-11 20:57 
GeneralReason for my vote of 5 Nice PinmemberShahare12-Sep-11 20:32 
GeneralI concur the idea is nice. I find Edward Nutting's comment v... PinmemberIlka Guigova5-Sep-11 17:05 
GeneralI would say that instead of having to create a new ToStringW... PinmemberEdward Nutting4-Sep-11 6:31 
Generalyou appear to be missing a <T> from your class declaration a... PinmemberGParkings2-Sep-11 12:50 
GeneralRe: Thanks, had some formatting issues which should be fixed now... PinmemberJay_Cee4-Sep-11 23:02 

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