Updating specific properties on an entity using Entity Framework

gistfile1.cs

//Open database context
using(DbContext db = new DbContext())
{
    
    //Get the id of the entity we want to update
    int id = 1;
    
    //Create an instance of the entity we want to update
    SomeEntity entity = new SomeEntity(){
        Id = id,
        Email = "foo@bar.com"
        //Name = 'yada yada'
        //Birthady = 'yada yada'
    };
    
    //Attach the entity to the context
    db.YourDbSet.Attach(entity);
    
    //Now set the entity's Email property to modified
    db.Entry(entity).Property("Email").IsModified = true;
    
    //Save the changes to the dbcontext
    db.SaveChanges();
    
}