MINIMUM DISTANCE BETWEEN TWO SIMILAR STRINGS

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using System;
using System.Linq;
public class Test
{
    public static void Main()
    {
        int arrayLength;
        int T = Convert.ToInt32(Console.ReadLine());
        for(int i=0;i<T;i++)
        {
            arrayLength = Convert.ToInt32(Console.ReadLine());
            string Line = Console.ReadLine();
            
            GetMinimumDistanceBetweenStrings(arrayLength,Line);
        }
    }
    public static void GetMinimumDistanceBetweenStrings(int length,string Line)
    {
        int min = -1;
        int initial=0;
        string[] stringArray = Line.Split(" ");
        for(int start=0;start<length-1;start++)
        {
            for(int a=start+1;a<=length-1;a++)
            {
                if(stringArray[start]==stringArray[a])
                {
                 if(initial==0)
                 {
                          min=a-start;
                          initial++;
                 }
                 else
                 {
                  if((a-start)<min)
                  {
                           min=(a-start);
                  }
                 }
                }
            }
        }
        Console.WriteLine(min);
 
    }
}

Language: C#