Gets the provider type of a key.
Assembly: mscorlib.Extensions (in mscorlib.Extensions.dll)
Valid values are determined by the cryptographic service provider used to create the key. Cryptographic service providers are generally organized into groups or families, each of which has its own set of data formats and processes. Two families that use the same algorithm, such as the RC2 block cipher, often use different padding schemes, different key lengths, and different default modes.
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