title: javascript equivalent of join() and toString() in c#?
body: <p>is there any method in c# thats equivalent to the javascript <strong>join()</strong>.. </p>
  
  <pre><code>   var keyStr = keyList.join("_");
  </code></pre>
  
  <p>My requirement is to concatenate the array of strings into an single string with the given separator.</p>
  
  <p>And i wanted to convert my whole string array into an single string... in javascript we can do this by calling <strong>toString()</strong> of the jabvascript array </p>
  
  <p>C# toString of an array just prints the type information. If we use toString on other types like int, it returns the string representation of an int. But why this is been not implemented in String array. wouldnt that strange??</p>
  
  <p>And </p>