Find Patterns in String based Arrays

using System;
using System.Text.RegularExpressions;

namespace DevDistrict.Text.Utilities
{
///
/// Locates a pattern in an array and returns the array index of the first match in the array
///
public class StringArrayLocator
{
private string[] _array;

public StringArrayLocator(string[] arr)
{
_array = arr;
}

public int Locate(string pattern)
{
for(int i=0;i<=_array.GetUpperBound(0);i++)
{
if(Regex.IsMatch(_array[i],pattern,RegexOptions.IgnoreCase))
{
return i;
}
}

return -1;
}
}
}