RouteConstraint for actions that starts with "Get"

ActionStartsWithGetConstraint.cs

public class ActionStartsWithGetConstraint : IRouteConstraint
{
    public bool Match(HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
    {
        var action = values["action"];
        if (action == null)
        {
            return false;
        }

        string actionValue = Convert.ToString(action);
        return actionValue.StartsWith("get", StringComparison.InvariantCultureIgnoreCase);
    }
}