Updating all 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 = "Joshua Harms",
        Birthady = "July 5th"
    };
    
    //Attach the entity to the context
    db.YourDbSet.Attach(entity);
    
    //Now set the entity's entire state to modifed
    db.Entry(entity).State = System.Data.Entity.EntityState.Modified;
    
    //Save the changes to the dbcontext
    db.SaveChanges();
    
}