IDataReader Wrapper that adds some functionality

ExtendedDataRecord.cs

internal class ExtendedDataRecord : IDataRecord
{
    public ExtendedDataRecord(IDataReader reader)
    {
        _reader = reader;
    }
    public int IndexOf(string name)
    {
        if (_fieldNames == null)
        {
            _fieldNames = new Dictionary<string, int>(StringComparer.InvariantCultureIgnoreCase);
            for (int i = 0; i < _reader.FieldCount; i++)
            {
                _fieldNames.Add(_reader.GetName(i), i);
            }
        }
        if (_fieldNames.TryGetValue(name, out int o))
        {
            return o;
        }
        return -1;
    }

    public TValue TryGetValue<TValue>(string name)
    {
        int ordinal = IndexOf(name);
        if (ordinal != -1)
        {
            object o = GetValue(ordinal);

            if (o != DBNull.Value) return (TValue)o;
        }

        return default(TValue);
    }

    private readonly IDataReader _reader;
    private Dictionary<string, int> _fieldNames = null;

    public object this[int i] => _reader[i];
    public object this[string name] => _reader[name];
    public int FieldCount => _reader.FieldCount;
    public bool GetBoolean(int i) => _reader.GetBoolean(i);
    public byte GetByte(int i) => _reader.GetByte(i);
    public long GetBytes(int i, long fieldOffset, byte[] buffer, int bufferoffset, int length) => _reader.GetBytes(i, fieldOffset, buffer, bufferoffset, length);
    public char GetChar(int i) => _reader.GetChar(i);
    public long GetChars(int i, long fieldoffset, char[] buffer, int bufferoffset, int length) => _reader.GetChars(i, fieldoffset, buffer, bufferoffset, length);
    public IDataReader GetData(int i) => _reader.GetData(i);
    public string GetDataTypeName(int i) => _reader.GetDataTypeName(i);
    public DateTime GetDateTime(int i) => _reader.GetDateTime(i);
    public decimal GetDecimal(int i) => _reader.GetDecimal(i);
    public double GetDouble(int i) => _reader.GetDouble(i);
    public Type GetFieldType(int i) => _reader.GetFieldType(i);
    public float GetFloat(int i) => _reader.GetFloat(i);
    public Guid GetGuid(int i) => _reader.GetGuid(i);
    public short GetInt16(int i) => _reader.GetInt16(i);
    public int GetInt32(int i) => _reader.GetInt32(i);
    public long GetInt64(int i) => _reader.GetInt64(i);
    public string GetName(int i) => _reader.GetName(i);
    public int GetOrdinal(string name) => _reader.GetOrdinal(name);
    public string GetString(int i) => _reader.GetString(i);
    public object GetValue(int i) => _reader.GetValue(i);
    public int GetValues(object[] values) => _reader.GetValues(values);
    public bool IsDBNull(int i) => _reader.IsDBNull(i);
}