title: Opening Visual Studio 2010 Solution In Visual Studio 2013
body: <p>I have a solution file which has 10 in the lower left corner of the solution.  I only have VS2013 installed on my computer.  Anytime, I attempt to open the solution I get this error:</p>
  
  <blockquote>
    <p>One or more projects in the solution were not loaded correctly<br>
    Please see the Output Window for details</p>
  </blockquote>
  
  <p>And the details in the output window are:</p>
  
  <blockquote>
    <p>C:\Users\Desktop\ERT - ERT-sdk\C#\4.0\Sample.csproj : error  <br> The project file could not be loaded. <br>Data at the root level is invalid. Line 1, position 1.  <br>
    C:\Users\Desktop\ERT - ERT-sdk\C#\4.0\Sample.csproj</p>
  </blockquote>
  
  <p>What do I need to alter so I can load the solution and project files on my PC in VS2013?</p>
  
  <p><strong>EDIT</strong><br>
  Below are the top 7 lines of the sample.csproj file.  If more lines are needed just let me know, thanks!!</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"&gt;
  &lt;PropertyGroup&gt;
  &lt;ProjectType&gt;Local&lt;/ProjectType&gt;
  &lt;ProductVersion&gt;9.0.21022&lt;/ProductVersion&gt;
  &lt;SchemaVersion&gt;2.0&lt;/SchemaVersion&gt;
  &lt;ProjectGuid&gt;{90CCE281-D71C-4EA6-9C17-A3C052B583D4}&lt;/ProjectGuid&gt;
  </code></pre>
  
  <p><strong>EDIT 2</strong><br>
  Running it through an XML syntax-check on www.w3schools.com/xml/sml_validator.asp It throws the error:</p>
  
  <pre><code>Error on Line 1 at column 6:
  XML declaration allowed only at the start of the document
  </code></pre>