Great, thanks

>That's the .Net version, which was introduced in 2010. You should be fine using any newer version as you can target 4.0.
>
>>Thanks Craig,
>>
>>I see Project ToolsVersion="4.0"
>>
>>Which version is that?
>>
>>
>>>Everything is in the project files, csproj for C# or vbproj for VB. You can create a new empty solution then add those project files to it.
>>>
>>>To find out the version, open the project file with a text editor. At the top you should see "Project ToolsVersion="
>>>
>>>The .suo files probably won't help much. They are settings files for the developer (window positions, break point locations, etc). In fact, they shouldn't be checked in because they are different for every developer.
>>>
>>>
>>>>Hi,
>>>>
>>>>a client has asked me to look at some source code from a developer who did some stuff for them. The code looks like it is Visual Studio and C#, but the solution files are all 0KB in size and completely empty.
>>>>
>>>>What would cause this? Would the developer have deleted the contents on purpose? There are matching suo files with stuff in them.
>>>>
>>>>Also, is there any way to tell what version of visual studio was used?