I was developing just fine in VS 2008 and testing my ASP.NET web site on my development server when suddenly I was unable to run my web site anymore. As soon as I hit F5, the message appears: U...

I'm trying to add a column to an existing DataRow in C#. Afterwards the column will be filled with a single value from my database. DataRow dr already exists and column "COLNAME" also exists. comT...

I'm trying to find out why ASP.NET Development Server is not processing the requests concurrently. So I've created a simple aspx page with the following code: Protected Sub Page_Load(ByVal sende...

I have a WebSite project in Visual Studio 2008 (not a Web Application project!) How do I set the ASP.NET Development startup port to a static port in a WebSite project?

I have created an ASP.NET 4 based website. At first I ran the default site as it was generated by Visual Studio ASP.NET 4 Internet Application template. I just hit the Debug button, and IE was lau...

I'm having some trouble getting an SVG file set as a background of an element in an MVC 3 Site (Razor View Engine) and wondering if the ASP.Net Development Server (Cassini?) is properly serving the...

I've been working on the ASP.NET Development Server recently (on an MVC project and I'm finding that it is inconsistent in how it serves the changes I make to my code. For example, I make a change ...

Can you programatically detect if the Development server in Visual Studio is used instead of IIS?

I am attempting to debug a (RESTful) WCF app using Fiddler. I run my project via VS IDE - which launches my app in the ASP.NET Development Server aka Cassini. I then launch Fiddler and in the Reque...

I can't seem to find any information on this anywhere. Either it's my imagination or the ASP.NET Dev Server (Cassini) cannot handle multiple threads (e.g. multiple requests). Is this correct? Doe...

While I do not see any functionally or jquery UI elements affected by this, but when I access my asp.net mvc web page the chrome developer console is logged with a bunch of error messages like so: ...

I know that generally speaking, this cant be done, that is get another PC to call a site hosted under the ASP.NET DEvelopment Web Server remotely (generally you can only use localhost:port to get t...