<p>I need to pad the output of an integer to a given length.</p>

<p>For example, with a length of 4 digits, the output of the integer 4 is "0004" instead of "4". How can I do this in C# 2.0?</p>

Use the string.Format command.
```
```
output = String.Format("{0:0000}", intVariable);
```
```
More details:
http://msdn.microsoft.com/en-us/library/fht0f5be.aspx