Why use the following statement using aName = library in c#? -

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i searching zigbee library c# , found gbee. took code , i've found following statement:

using atcmd = netmf.opensource.xbee.api.common.atcmd;

why used statement , means?
searching code found atcmd used "class" send standard command e.g.(atcmd.restoredefaults,atcmd.networkreset)

this meas, atcmd statements in code become netmf.opensource.xbee.api.common namespace. means 'default namespace' type.

probably have in code 2 exact names, deriving different namespaces.

from msdn:

this called using alias directive


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