Parser Error Message: Ambiguous match found


On deploying a newly precompiled web site, the error message as displayed by ASP.NET is as follows:

Server Error in ‘/’ Application.

Parser Error

Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: Ambiguous match found.

Source Error:

Line 1:  <%@ control language="C#" autoeventwireup="true" enableviewstate="false" inherits="WebSiteControls_Offers_TypeFilter, App_Web_typefilter.ascx.bd9a439f" %>

Line 2:
Line 3: <%--

Source File: /WebSiteControls/Offers/TypeFilter.ascx    Line: 1

Version Information: Microsoft .NET Framework Version:2.0.50727.3053; ASP.NET Version:2.0.50727.3053

System Information

This may or may not be relevant, but it reflects my set up at the time I discovered this issue.

  • Web Site project
  • Visual Studio 2008
  • .NET 3.5
  • IIS 6.0



The reason for this is that a control, in this case a Repeater, in the User Control had a similar name as a field on the code behind. The only difference between the two the case. One was called “offerTypes” (in the code behind, an IEnumerable containing entities from the business layer), the other “OfferTypes” (a ASP.NET Repeater control).


Rename one or other so that the names differ by more that case alone. In my case, I renamed the field referring to the entities to offerTypeInformation.

1 Comment

  1. vidyasagar says:


    Thank you for this post. Helped me in solving my issue.

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