c# - Very confused about how to Group by in LINQ, and even more confused about HAVING -

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I'm new to Linq. I'm trying to change this simple SQL query, but to change LINQ to SQL No great resources can be found. My SQL query is: 

  Select some value from some value SomeValue HAVING SUM (OtherValue) & gt; 0;   
 I do not understand enough LINQ to do this. I'm having a lot of trouble working with the group, I have not tried to deal with it so far.  
 I have tried some things. This is most recent, though it is still very wrong:  
  By entering someTable group entry from the entry. Select grp in some values ​​grp.Select (x = & gt; x.SomeValue) .toList ();   
 Any help or resources will be good.   
 
 
 The grouping is working to get it seems that you want it (rather than Lambda Query syntax):  
  Log in from some entry into the Stable Group Entry. Some values ​​include GRP where grp.Sum (x => x .OtherValue) & gt; 0 Select grp.Key;

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