How do I remove a String Array from a List in C#?

You can use Remove() method if you already have a reference to the string array that you want to remove like the following:

 List<string[]> theList = new List<string[]>();
 string[] myStringarray = new string[] { "a", "b", "c" };
 theList.Add(myStringarray);

 //remove myStringarray from the main list
 theList.Remove(myStringarray);

However if you are getting the items from the user and you want to search for an array that contains these elements and remove them, I recommend creating an extension method like the following:

public static class ExtensionMethods
{
    public static string[] FindAndRemove(this ICollection<string[]> list, string[] items)
    {
        string[] removedList = null;
        foreach (var stringArray in list)
        {
            if (stringArray.SequenceEqual(items))
            {
                removedList = stringArray;
                break;
            }
        }
        if (removedList != null)
        {
            list.Remove(removedList);
        }
        return removedList;
    }
}

Which is mainly search for the first array that its elements equal the passed element in item array (the parameter) and remove it, you can further improve this method and make it remove all the lists that satisfy the condition as following:

 public static class ExtensionMethods
 {
    public static int FindAndRemove(this List<string[]> list, string[] items)
    {
        return list.RemoveAll(arr => arr.SequenceEqual(items));
    }
 }

Here I have used RemoveAll from Linq library, which remove all the lists that meet the given condition. Note that SequecnceEqual also exists inside linq library and used to:

Determines whether two sequences are equal by comparing the elements by using the default equality comparer for their type.

I would use List.RemoveAll (https://msdn.microsoft.com/en-us/library/wdka673a(v=vs.110).aspx)

Remove all takes a predicate function which will allow you to find any items you want to remove.

For example if the containing array has a specific value in it.

For the case RemoveAll with a predicate I offerthe following (removing by avalue in arrays)

        List<string[]> theList = new List<string[]>();
        string[] myStringarray = new string[] { "a", "b", "c" };
        theList.Add(myStringarray);
        theList.Add(new string[] { "d", "e", "f" });            
        theList.RemoveAll(zz => zz.Where(xx => xx == "b").Count() > 0);

You can simply use Remove function:

List<string[]> theList = new List<string[]>();
string[] myStringarray = new string[] { a, b, c };
theList.Add(myStringarray);
theList.Remove(myStringarray);

Remove() Removes the the specified element.
RemoveAt() Removes the element at the specified index.
RemoveAll() Removes all the elements that match with the supplied predicate function.

If you want to check if the arrays are match. you can use:

for(int i=0;i<theList.Count();i++)
{
    bool areEqual =theList[i].SequenceEqual(newStringArray);
    if(areEqual)
      theList.RemoveAt(i);
}

• Take iterator .........

  Block quote

  Iterator itr =list.iterator(); while(itr.hasNext()){ //some condition itr.remove(); }

  Block quote

  .......