public void ReplaceAllValues()
{
SPSKeyValueList keyValues = new SPSKeyValueList();
keyValues.Add(new SPSKeyValuePair("Key", "Value"));
keyValues.Add(new SPSKeyValuePair("Key", "Value"));
keyValues.ReplaceAllValues("Key", "NewValue");
Assert.IsTrue(keyValues[0].Value == "NewValue");
Assert.IsTrue(keyValues[1].Value == "NewValue");
}