What means "=>" in C#, how can I search about this in google?

Can somebody explain, or provide a link where about "=>" explained based on some examples?

To search in google for "=>" - what should I enter?

Here is a part of code example code wher this syntax is used
 public List NavigationList { set; get; }
...
 listNavigation = this.NavigationList.FindAll(item => item.Level == i);

Thanks a lot!