Validate that a given string (name) meets certain requirements

String Name = "yyyy MM DD abjwg kelk.exe"

public static bool IsNameRight(string Name)
{
    string[] temp = Name.Split(' ');
    string[] de= Name.Split('.');

    if (de[1] == "pdf" && temp .Length == 5)
    {
        if (temp [0].Length == 4
            && temp [1].Length == 2 
            && temp [3].Length == 2
            && temp [4] == "abjwg" 
            && temp [5] == "kelk.exe")
            return true;
        else
            return false;
    }
    return false;
}

I am using .NET 3.5 and C#

EDIT

You could use Regular expressions but I have never used it or know how to use it, and don't know if it is a good practice.

As you wanted to use RegEx I have a recommendation for you:

public static bool IsValidName(string Name)
{
    if(String.IsNullOrEmpty(Name))
        return new ArgumentNullException();

    string pattern = @"^[0-9]{4} [0-9]{2} [0-9]{2} abjwg kelk\\.exe$";
    return Regex.IsMatch(Name, pattern);
}

StackExchange Code Review Q#17949, answer score: 15