How to Remove an Element from a C# Array?

Remove specific elements from ordinary arrays

When using an array in C#, you may need to remove specific elements from the collection. For ordinary array, unlike the list class, there is no removeat () method that can be used directly. This allows developers to find alternative methods to achieve this function.

Solution:

In order to overcome this limit, you can first convert the ordinary array to List, perform the removal operation, and then convert the modified List to the array, so as to use the List's remaint () method.

Extension method replacement scheme:

<code class="language-c#">var foos = new List<foo>(array);
foos.RemoveAt(index);
return foos.ToArray();</code>

or, you can consider using an expansion method of using an analog ordinary array Removeat () function:

This extension method allows more conveniently to remove operations:

<code class="language-c#">public static T[] RemoveAt<T>(this T[] source, int index)
{
    T[] dest = new T[source.Length - 1];
    if( index > 0 )
        Array.Copy(source, 0, dest, 0, index);

    if( index < source.Length -1 )
        Array.Copy(source, index + 1, dest, index, source.Length - index - 1);

    return dest;
}</code>

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