您可能会找到 Bouncycastle C＃库对于解决您的问题很有价值。有一个PEMReader类应该能够读取您的PEM文件并将其内容转换为Bouncycastle加密对象。还有一个DotNetUtilities类可以在Bouncycastle和.NET加密对象之间建立桥梁。

You may find the Bouncycastle C# library to be of value in your problem. There is a PEMReader class that should be able to read in your PEM file and convert the contents to Bouncycastle cryptography objects. And there is a DotNetUtilities class to provide a bridge between Bouncycastle and .NET cryptography objects.