String manipluation inside an expression shape

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- August 12, 2009 at 12:15 AM #23013
  community-content
```
Hi,  
  
I have defined a 'System.String' variable to hold some string value in an  
  
expression shape next i wanted to extract a part of it using the 'Substring'  
  
method but i am not able do that.It doesnt allow me to put a dot next to my  
  
string variable. Why is it so.?  
  
Note- I am using Biztalk 2004
```
- September 1, 2009 at 8:35 AM #23177
  community-content
  Hi,
  
     Use the definition System.String in the following way in your Expression shape:
  
  if (System.String.Equals(<YourVariable>, ‘somestring’))
  
  {
  
      //Your code here
  
  }
  
     Keep in mind that the programming language used in BizTalk environment and Expression shapes is XLANGs, not C#, and is more limited in what you can do with string functionality.
  
  Good luck!
  
  Daniel.
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