C# this = null

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UserManager asp. If the variable has a non-null value, then it will be set to true. Value is of Boolean type. The variable value contains the data stored in the nullable type. HasValue Console. WriteLine var. ToString ; else Console. So in this way, the Null values are handled in C. Now we will see one other important term associated with Null types, and that is Null-Collation in the next section of this post.

It is known as the null-coalescing operator that is used to define the default value for nullable reference or value types. In case if the operand is not null then it returns left-hand operand otherwise the right operand is returned by this. It is used to check the null values. In case if you want to assign a default value to any variable the time when it is null, then you can use Null Coalescing Operator?? WriteLine myname ; Console. Age property value to We have set emp.

You can see in the out put window, we are able to fetch Name and Age property value correctly using, However Address properties are displayed as empty.

Lets see why this happened here? Name and emp? Age evaluated to valid values. In case of emp. City , emp? State , emp? Country and emp? For example, In below case, Age property is a value type and emp?. Age returns int? So while assigning it to a variable then you have to declare the variable as nullable type. In below case we have declared int? For example, when we invoke emp?. If emp is NULL then no further call in the expression will occur.

If you club null conditional operator?.