.net generate constructor based on fields .net

I'm producing very code using Identities Project to represent the objects, 开发者_运维技巧but it is some 1000 entities, and i need to know if exists some plugin or something .net free than produces auto contructor to each instance based on class fields.

Example

class Thing {
  public readonly string a;
  public readonly Object b;
}

// Generated
public Thing(string a, Object b){
  this.a = a;
  this.b = b;
}

apreciate the help thanks :)

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ReSharper could help with this. But it sounds like some sort of code generation might be a better bet.