可以做到，但是还不漂亮！
例如，要获得
Where问题中提到的第一个过载，可以执行以下操作：
var where1 = typeof(Queryable).GetMethods() .Where(x => x.Name == "Where") .Select(x => new { M = x, P = x.GetParameters() }) .Where(x => x.P.Length == 2 && x.P[0].ParameterType.IsGenericType && x.P[0].ParameterType.GetGenericTypeDefinition() == typeof(IQueryable<>) && x.P[1].ParameterType.IsGenericType && x.P[1].ParameterType.GetGenericTypeDefinition() == typeof(expression<>)) .Select(x => new { x.M, A = x.P[1].ParameterType.GetGenericArguments() }) .Where(x => x.A[0].IsGenericType && x.A[0].GetGenericTypeDefinition() == typeof(Func<,>)) .Select(x => new { x.M, A = x.A[0].GetGenericArguments() }) .Where(x => x.A[0].IsGenericParameter && x.A[1] == typeof(bool)) .Select(x => x.M) .SingleOrDefault();或者，如果您想第二次重载：
var where2 = typeof(Queryable).GetMethods() .Where(x => x.Name == "Where") .Select(x => new { M = x, P = x.GetParameters() }) .Where(x => x.P.Length == 2 && x.P[0].ParameterType.IsGenericType && x.P[0].ParameterType.GetGenericTypeDefinition() == typeof(IQueryable<>) && x.P[1].ParameterType.IsGenericType && x.P[1].ParameterType.GetGenericTypeDefinition() == typeof(expression<>)) .Select(x => new { x.M, A = x.P[1].ParameterType.GetGenericArguments() }) .Where(x => x.A[0].IsGenericType && x.A[0].GetGenericTypeDefinition() == typeof(Func<,,>)) .Select(x => new { x.M, A = x.A[0].GetGenericArguments() }) .Where(x => x.A[0].IsGenericParameter && x.A[1] == typeof(int) && x.A[2] == typeof(bool)) .Select(x => x.M) .SingleOrDefault();
