convert value of InwSimpleVertex to float in C#

public void Triangle(COMApi.InwSimpleVertex v1,                          COMApi.InwSimpleVertex v2,                          COMApi.InwSimpleVertex v3)    {        // do your work             // get the first value of the vertex             float fVal_nw2012_VS2010 = (float)(((Array)v1.coord)).GetValue(1);      }

However, this does not work with Navisworks 2013. You will receive an error ‘Unable to cast object of type ‘System.Single[]’ to type ‘System.Single[]’. The reason is all to do with the interaction between none ‘0 based’ SAFEARRAYS and recent .NET 4.0 C# dynamics. All our COM Api SAFEARRAYs  are 1 based, and the Dot NET dynamic system really doesn’t like this one little bit. Behind the scenes it makes a multi-dimensional Single[] array with just one dimension, it then tries to cast it to a single-dimensional Single[] array and thus explodes. The VS2010 debugger confuses things as it ‘debatably wrongly’ reports the array as Single[] rather than Single[*].  The solution is as below:

public void Triangle(COMApi.InwSimpleVertex v1,                          COMApi.InwSimpleVertex v2,                          COMApi.InwSimpleVertex v3)    {        // do your work             // get the first value of the vertex             Array array_v1 = (Array)(object)v1.coord;

<pre class="line-numbers"><code>float fVal_nw2013_VS2010 = (float)(array_v1.GetValue(1));</code></pre>    <div style="font-family: courier new;background: white;color: black;font-size: 8pt">     <p style="margin: 0px"><span style="color: blue">&#160;</span></p>      <p style="margin: 0px">}</p>   </div> </div>  <p>&#160;</p>  <p>Note: You must use GetValue() rather than [] indexer.</p>  <p>This is similar to other variant if it is an array such as InwLTransform3f.