Check if an entity exists in a Azure Table Storage

entity_exists.cs

public async Task<bool> EntityExists(string partitionKey, string rowKey)
{
    var tableQuery = new TableQuery<DynamicTableEntity>();
    tableQuery.FilterString = TableQuery.CombineFilters(
            TableQuery.GenerateFilterCondition("PartitionKey", QueryComparisons.Equal, partitionKey),
            TableOperators.And,
            TableQuery.GenerateFilterCondition("RowKey", QueryComparisons.Equal, rowKey));

    var dynamicTableEntities = await CloudTable.ExecuteQuerySegmentedAsync(tableQuery, null, TableRequestOptions, OperationContext);
    return dynamicTableEntities.Results.Any();
}

It looks easier

public async Task<bool> EntityExists(string partitionKey, string rowKey)
{ 
   var result = await CloudTable.ExecuteAsync(TableOperation.Retrieve<TableEntity>(partitionKey, rowKey)); 
   return result.Result != null; // or result.HttpStatusCode != 404
}