Hi all,

We have a updatable web site project that is written in c#, it has the usual web form implementation using master page, skins, user controls,...etc. Up to this point we neglect to change the default compilation language from VB to C#. However, the second we change it, we see the following error.

Object reference not set to an instance of an object. --->
System.NullReferenceException: Object reference not set to an instance
of an object. at ASP.Default.__DataBinding__control499(Object sender,
EventArgs e) at System.Web.UI.Control.OnDataBinding(EventArgs e) at
System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) at
System.Web.UI.Control.DataBindChildren() at
System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) at
System.Web.UI.Control.DataBindChildren() at
System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) at
System.Web.UI.Control.DataBindChildren() at
System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) at
System.Web.UI.Control.DataBindChildren() at
System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) at
....

Further investigation points out that this error is getting generated from a Theme related assembly (Source : App_Theme_Default.zclakrlo). Any ideas?

One of my co-worker suggested that it might be skin file related since we have a theme call "Default" and there is no way to specify a language on a skin file. Therefore, when the asp.net runtime tries to compile it under C#, it will give a name collision? Does this make sense?

Any help is appreciated.