How can we group data using Linq based on dates and then get the count of each group?

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Assuming we have a list of objects with a date property called "Date":

List<MyObject> myObjects = new List<MyObject>();

We can use Linq to group the objects by date and get the count of each group like this:

var groupedData = myObjects
    .GroupBy(o => o.Date.Date)
    .Select(g => new { Date = g.Key, Count = g.Count() });

This groups the objects by the date portion of the "Date" property and returns an anonymous type with two properties: "Date" (the date being grouped by) and "Count" (the number of objects in that group).