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4 changes: 2 additions & 2 deletions docs/csharp/programming-guide/nullable-types/index.md
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Expand Up @@ -36,7 +36,7 @@ translation.priority.ht:
- "zh-tw"
---
# Nullable Types (C# Programming Guide)
Nullable types are instances of the <xref:System.Nullable%601?displayProperty=fullName> struct. A nullable type can represent the correct range of values for its underlying value type, plus an additional `null` value. For example, a `Nullable<Int32>`, pronounced "Nullable of Int32," can be assigned any value from -2147483648 to 2147483647, or it can be assigned the `null` value. A `Nullable<bool>` can be assigned the values [true](../../../csharp/language-reference/keywords/true.md)[false](../../../csharp/language-reference/keywords/false.md), or [null](../../../csharp/language-reference/keywords/null.md). The ability to assign `null` to numeric and Boolean types is especially useful when you are dealing with databases and other data types that contain elements that may not be assigned a value. For example, a Boolean field in a database can store the values `true` or `false`, or it may be undefined.
Nullable types are instances of the <xref:System.Nullable%601?displayProperty=fullName> struct. A nullable type can represent the correct range of values for its underlying value type, plus an additional `null` value. For example, a `Nullable<Int32>`, pronounced "Nullable of Int32," can be assigned any value from -2147483648 to 2147483647, or it can be assigned the `null` value. A `Nullable<bool>` can be assigned the values [true](../../../csharp/language-reference/keywords/true.md), [false](../../../csharp/language-reference/keywords/false.md), or [null](../../../csharp/language-reference/keywords/null.md). The ability to assign `null` to numeric and Boolean types is especially useful when you are dealing with databases and other data types that contain elements that may not be assigned a value. For example, a Boolean field in a database can store the values `true` or `false`, or it may be undefined.

[!code-cs[csProgGuideTypes#3](../../../csharp/programming-guide/nullable-types/codesnippet/CSharp/index_1.cs)]

Expand Down Expand Up @@ -90,4 +90,4 @@ Nullable types are instances of the <xref:System.Nullable%601?displayProperty=fu
[C# Programming Guide](../../../csharp/programming-guide/index.md)
[C#](../../../csharp/csharp.md)
[C# Reference](../../../csharp/language-reference/index.md)
[What exactly does 'lifted' mean?](http://go.microsoft.com/fwlink/?LinkId=112382)
[What exactly does 'lifted' mean?](http://go.microsoft.com/fwlink/?LinkId=112382)