Can not locate xmpir64.dll

[Memnarch]

After installing and starting my project, I get this exception:

System.TypeInitializationException
HResult=0x80131534
Message=The type initializer for 'Mpir.NET.mpir' threw an exception.
Source=Mpir.NET
StackTrace:
at Mpir.NET.mpir.mpz_init_set_si(Int32 op)
at Mpir.NET.mpz_t..ctor(Int32 op)
at Mpir.NET.mpz_t.op_Implicit(Int32 value)
at PiDemo.Program.d__0.MoveNext() in C:\Users<user>\source\repos\PiDemo\Program.cs:line 13
at System.Collections.Generic.List1.InsertRange(Int32 index, IEnumerable1 collection)
at System.Collections.Generic.List1.AddRange(IEnumerable1 collection)
at PiDemo.Program.Main(String[] args) in C:\Users<user>\source\repos\PiDemo\Program.cs:line 58

This exception was originally thrown at this call stack:
[External Code]

Inner Exception 1:
Exception: MPIR: can't determine path to the xmpir64.dll

[l1t1]

I also got this error about xmpir64.dll

未经处理的异常:  System.TypeInitializationException: “Mpir.NET.mpir”的类型初始值设定项引发异常。 ---> System.Exception: MPIR: can't determine path to the xmpir64.dll
   在 Mpir.NET.mpir.LocateLibrary(String name)
   在 Mpir.NET.mpir.GetXMPIRLibraryPath()
   在 Mpir.NET.mpir.initialize_hxmpir()
   在 Mpir.NET.mpir..cctor()
   --- 内部异常堆栈跟踪的结尾 ---
   在 Mpir.NET.mpir.mpz_init()
   在 Mpir.NET.mpz_t..ctor(UInt64 op)
   在 MpirSample.Main()