How to retrieve single entity from azure table w/o using partition n row key

I want to create a generic function to retrieve an entity from azure table storage.Now i have multiple entities in a table, each having different properties. So i want to retrieve a single entity from a partition filtering by the property of the entity. I have generated random row keys (from 1-100). So retrieving using partition n row key is not an option for me. Want to retrieve using partition key and 1or2 properties of the entity? how to do that?

I have written this to retrieve all values from a partition:

    public object GetEntity(string partitionKey, string rowKey)
{  
    CloudTable table = tableClient.GetTableReference(Constants.STORAGETABLENAME);
    TableOperation tableOperation = null;
    switch (partitionKey)
    {

        case Constants.PARTITION_RESPONSEFILTERVALUE:
            tableOperation = TableOperation.Retrieve<ResponseFilterParamsEntity>(partitionKey, rowKey);
            break;
        case Constants.PARTITION_RESPONSEFILTER:
            tableOperation = TableOperation.Retrieve<ResponseFilterFieldsEntity>(partitionKey, rowKey);
            break;
        case Constants.PARTITION_REDISCACHE:
            tableOperation = TableOperation.Retrieve<RedisCacheEntity>(partitionKey, rowKey);
            break;                
        default:break;
    }
    return table.Execute(tableOperation).Result;
}

This function filters using partition key and only 1 property :

public List<T> GetCustEntities<T>(string partitionKey, string strFilter, string strFilterValue, T entity) where T : TableEntity, new()
{
    try
    {
        var table = tableClient.GetTableReference(Constants.STORAGETABLENAME);
        var Q1 = new TableQuery<T>().Where(TableQuery.CombineFilters(TableQuery.GenerateFilterCondition("PartitionKey", QueryComparisons.Equal, partitionKey),
                                                                        TableOperators.And,
                                                                        TableQuery.GenerateFilterCondition(strFilter, QueryComparisons.Equal, strFilterValue)));
        var results = table.ExecuteQuery(Q1).Select(ent => (T)ent).ToList();

        return results;

    }
    catch (StorageException ex)
    {
        return null;
    }
}