# ReferenceExpressionBuilder.build

- Module: [Aspire.Hosting](/reference/api/typescript/aspire.hosting.md)
- Defined on: [ReferenceExpressionBuilder](/reference/api/typescript/aspire.hosting/referenceexpressionbuilder.md)
- Version: `13.4.0`
- Kind: `method`

Builds the reference expression

## Definition

```typescript
interface ReferenceExpressionBuilder {
  // ... omitted for brevity
  build(): ReferenceExpression;
}
```

## Signature

```typescript
build(): ReferenceExpression
```

## Returns

[ReferenceExpression](/reference/api/typescript/aspire.hosting/referenceexpression.md)

## Defined on

- [ReferenceExpressionBuilder](/reference/api/typescript/aspire.hosting/referenceexpressionbuilder.md) -- `handle`