How to clear array in c#?

public Boolean validate(DataSet ds)
{
int mn = 0;
int count = 0;
int y = 0;
int x = 0;
int rowcountvalue = 0;
int t = 0;
int c = 1;
int rj = 0;




string[] text;





string s01 = string.Empty;

string name1 = string.Empty;
for (int i = 0; i < ds.Tables[s].Columns.Count; i++)
{
if (ds.Tables[0].Rows[0][i].ToString().ToUpper().Trim().Contains("NUMBER :"))//SPIR Number taken
{
s01 = ds.Tables[s].Rows[0][i].ToString().Trim();
text = s01.Split(':');
i = ds.Tables[0].Columns.Count;
}
}

name1 = text[1].ToString().ToUpper().Trim();