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[Function(Name = "NEWID", IsComposable = true)]
public Guid NEWID() { return ((Guid)(this.ExecuteMethodCall(this, ((MethodInfo)(MethodInfo.GetCurrentMethod()))).ReturnValue)); }
var query= from rnd in new BackendDBContext().Categories
orderby new dbcontext().NEWID()
select rnd;
var query= from rnd in new BackendDBContext().Categories
orderby Guid.NewGuid()
select rnd;